IS0: Indicator Section

Standard

octet(s) content value meaning notes
1-4 "grib" definition 71, 82, 73, 76 'GRIB' Coded according to the International Alphabet Number 5
5-6 reserved      
7 discipline 0 meteorological  
8 grib edition number 2    
9 total length of grib message in octets varies    

 

IS1: Identification Section

Standard

octet(s) content value meaning
1-4 length of section in octets 21  
5 section number 1  
6 ID of originating center 7 National Weather Service - NCEP
8 ID of origin sub-center 14 MDL
10 GRIB master tables version number 1  
11 GRIB local tables' version number 0  
12 significance of reference time 1 start of forecast
13-14 Year varies  
15 Month varies  
16 Day varies  
17 Hour 0  
18 Minute 0  
19 Second 0  
20 Production Status of Processed data in the GRIB message 0 operational product
21 Type of processed data in this GRIB message 1 forecast products

 

tstm03

octet(s) content value meaning
1-4 length of section in octets 21  
5 section number 1  
6 ID of originating center 7 National Weather Service - NCEP
8 ID of origin sub-center 14 MDL
10 GRIB master tables version number 2  
11 GRIB local tables' version number 1  
12 significance of reference time 1 start of forecast
13-14 Year varies  
15 Month varies  
16 Day varies  
17 Hour 0  
18 Minute 0  
19 Second 0  
20 Production Status of Processed data in the GRIB message 1 operational test product
21 Type of processed data in this GRIB message 1 forecast products

 

IS2: Local Use Section

This section is not used by NBM products at this time. All octet values=0

 

IS3: Grid Definition Section

CONUS

octet(s) content value meaning notes
1-4 Length of the section 81    
5 section number 3    
6 Source of grid definition 0   Specified in Code - oct 3.13
7-10 Number of data points 3744965    
11 Number of octets for optional list of numbers defining number of points 0 grid is regular; no appended data  
12 Interpretation of list of numbers defining number of points 0 There is no appended list  
13-14 Grid definition template number 30 Lambert Conformal Can be Secant, Tangent, Conical, or Bipolar;
15 Shape of the Earth 1 Earth assumed spherical with radius specified (in m) by data producer  
16 Scale factor of radius of spherical Earth 0    
17-20 Scale value of radius of spherical Earth 6371200    
21 Scale factor of major axis of oblate spheroid Earth 255    
22-25 Scaled value of major axis of oblate spheroid Earth 255    
26 Scale factor of minor axis of oblate spheroid Earth 255    
27-30 Scaled value of minor axis of oblate spheroid Earth 255    
31-34 Nx ― number of points along the x-axis 2345    
35-38 Ny — number of points along the y-axis 1597    
39-42 La1― latitude of first grid point 19229000    
43-46 Lo1― longitude of first grid point 233723400    
47 Resolution and component flags 48 i direction increments given; j direction increments given; Resolved u and v components of vector quantities relative to easterly and northerly directions convert value to binary to read in table 3.3 (48 = 00110000)
48-51 LaD ― latitude where Dx and Dy are specified 25000000    
52-55 LoV ― longitude of meridian parallel to y-axis along which latitude increases as the y-coordinate increases 265000000    
56-59 Dx ― x-direction grid length 2539703   Grid length is in units of 10-3 m at the latitude specified by LaD
60-63 Dy ― y-direction grid length 2539703   Grid length is in units of 10-3 m at the latitude specified by LaD
64 Projection centre flag 0 North Pole is on the projection plane; Only one projection center is used convert value to binary to read in table 3.5 (0 = 00000000)
65 Scanning mode 80 Points in the first row or column scan in the +i (+x) direction. Points in the first row or column scan in the +j (+y) direction.  Adjacent points in the j (x) direction are consecutive. Adjacent rows scan in the opposite direction. convert value to binary to read in table 3.4 (64 = 01010000)
66 Latin 1 ― first latitude from the pole at which the secant cone cuts the sphere 25000000    
70 Latin 2 ― second latitude from the pole at which the secant cone cuts the sphere 25000000    
74-77 Latitude of the southern pole of projection -90   For tstm03 this =0; for all others output read=4204967296 (for non-tstorm) Doesn't seem to be a valid entry; output degrib text=0-90; perhaps it is a bug in code for read-out for -90 value (after corrections)?;
78-81 Longitude of the southern pole of projection 0    

CONUS (dryts03/dryts06)

octet(s) content value meaning notes
1-4 Length of the section 81    
5 section number 3    
6 Source of grid definition 0    
7-10 Number of data points 3744965    
11 Number of octets for optional list of numbers defining number of points 0 grid is regular; no appended data  
12 Interpetation of list of numbers defining number of points 0 There is no appended list  
13-14 Grid definition template number 30 Lambert Conformal  
15 Shape of the Earth 6 Earth assumed spherical with radius = 6,371,229.0  
16 Scale factor of radius of spherical Earth 0    
17-20 Scale value of radius of spherical Earth 0    
21 Scale factor of major axis of oblate spheroid Earth 0    
22-25 Scaled value of major axis of oblate spheroid Earth 0    
26 Scale factor of minor axis of oblate spheroid Earth 0    
27-30 Scaled value of minor axis of oblate spheroid Earth 0    
31-34 Nx ― number of points along the x-axis 2345    
35-38 Ny — number of points along the y-axis 1597    
39-42 La1― latitude of first grid point 19229000    
43-46 Lo1― longitude of first grid point 233723400    
47 Resolution and component flags 56 i direction increments given; j direction increments given; Resolved u and v components of vector quantities relative to the defined grid in the direction of increasing x and y (or i and j) coordinates, respectively convert value to binary to read meaning in table 3.3 (56 =00111000)
48-51 LaD ― latitude where Dx and Dy are specified 25000000    
52-55 LoV ― longitude of meridian parallel to y-axis along which latitude increases as the y-coordinate increases 265000000    
56-59 Dx ― x-direction grid length 2539703    
60-63 Dy ― y-direction grid length 2539703    
64 Projection centre flag 0 North Pole is on the projection plane; Only one projection center is used  
65 Scanning mode 64 Points in the first row or column scan in the +i (+x) direction; Points in the first row or column scan in the +j (+y) direction; Adjacent points in the i (x) direction are consecutive; All rows scan in the same direction; Points within odd rows are not offset in i(x) direction; Points within even rows are not offset in i(x) direction; Points are not offset in j(y) direction; Rows have Ni grid points and columns have Nj grid points convert value to binary to read in table 3.4 (64 = 01000000)
66 Latin 1 ― first latitude from the pole at which the secant cone cuts the sphere 25000000    
70 Latin 2 ― second latitude from the pole at which the secant cone cuts the sphere 25000000    
74-77 Latitude of the southern pole of projection 0    
78-81 Longitude of the southern pole of projection 0    

Alaska

octet(s) content value meaning notes
1-4 Length of the section 65    
5 section number 3    
6 Source of grid definition 0 Specified in Code - oct 3.13  
7-10 Number of data points 1822145    
11 Number of octets for optional list of numbers defining number of points 0 grid is regular; no appended data  
12 Interpretation of list of numbers defining number of points 0 There is no appended list  
13-14 Grid definition template number 20 Polar Stereographic  
15 Shape of the Earth 1 Earth assumed spherical with radius specified (in m) by data producer  
16 Scale factor of radius of spherical Earth 0    
17-20 Scale value of radius of spherical Earth 6371200    
21 Scale factor of major axis of oblate spheroid Earth 255    
22-25 Scaled value of major axis of oblate spheroid Earth 255    
26 Scale factor of minor axis of oblate spheroid Earth 255    
27-30 Scaled value of minor axis of oblate spheroid Earth 255    
31-24 Nx ― number of points along the x-axis 1649    
35-38 Ny ― number of points along the y-axis 1105    
39-42 La1 ― latitude of first grid point 40530000    
43-46 Lo1 ― longitude of first grid point 181429000    
47 Resolution and component flags 48 i direction increments given; j direction increments given; Resolved u and v components of vector quantities relative to easterly and northerly directions convert value to binary to read in table 3.3 (48 = 00110000)
48-51 LaD ― latitude where Dx and Dy are specified 60000000    
52-55 LoV ― orientation of the grid 210000000   "LoV is the longitude value of the meridian which is parallel to the y-axis (or columns of the grid) along which latitude increases as the y-coordinate increases (the orientation longitude may or may not appear on a particular grid)."
56-59 Dx ― x-direction grid length 2976560   Grid length is in units of 10-3 m at the latitude specified by LaD
60-63 Dy ― y-direction grid length 2976560   Grid length is in units of 10-3 m at the latitude specified by LaD
64 Projection centre flag 0 North Pole is on the projection plane; Only one projection center is used convert value to binary to read in table 3.5 (0 = 00000000)
65 Scanning mode 80 Points in the first row or column scan in the +i (+x) direction. Points in the first row or column scan in the +j  (+y) direction. Adjacent points in the j (x) direction are                  consecutive. Adjacent rows scan in the opposite direction.  convert value to binary to read in table 3.4 (64 = 01010000)

Hawaii

octet(s) content value meaning notes
1-4 Length of the section 72    
5 section number 3    
6 Source of grid definition 0 Specified in Code - oct 3.13  
7-10 Number of data points 350625    
11 Number of octets for optional list of numbers defining number of points 0 grid is regular; no appended data  
12 Interpretation of list of numbers defining number of points 0 There is no appended list  
13-14 Grid definition template number 10 Mercator  
15 Shape of the Earth 1 Earth assumed spherical with radius specified (in m) by data producer  
16 Scale factor of radius of spherical Earth 0    
17-20 Scale value of radius of spherical Earth 6371200    
21 Scale factor of major axis of oblate spheroid Earth 255    
22-25 Scaled value of major axis of oblate spheroid Earth 255    
26 Scale factor of minor axis of oblate spheroid Earth 255    
27-30 Scaled value of minor axis of oblate spheroid Earth 255    
31-34 Nj—number of points along a parallel 625    
35-38 Nj—number of points along a meridian 561    
39-42 La1 ― latitude of first grid point 14351500    
43-46 Lo1 ― longitude of first grid point 195030500    
47 Resolution and component flags 0 i direction increments not given, j direction increments not given, Resolved u and v components of vector quantities relative to easterly and northerly directions convert value to binary to read meaning in table 3.3
48-51 LaD — latitude(s) at which the Mercator projection intersects the Earth (Latitude(s) where Di and Dj are specified) 20000000    
52-55 La2 ― latitude of last grid point 26860500    
56-59 Lo2 — longitude of last grid point 209959800    
60 Scanning mode 64 Points in the first row or column scan in the +i (+x) direction. Points in the first row or column scan in the +j  (+y) direction. Adjacent points in the j (x) direction are consecutive. Adjacent rows scan in the opposite direction. convert value to binary to read in table 3.4 (64 = 01010000)
61-64 Orientation of the grid, angle between i direction on the map and the Equator 200000000   Limited to the range of 0 to 90 degrees; if the angle of orientation of the grid is neither 0 nor 90 degrees, Di and Dj must be equal to each other
65-68 Dj — longitudinal direction grid length 2500000   Grid lengths are in units of 10-3 m, at the latitude specified by LaD
69-72 Dj ― latitudinal direction grid length 2500000   Grid lengths are in units of 10-3 m, at the latitude specified by LaD

Puerto Rico

octet(s) content value meaning notes
1-4 Length of the section 72    
5 section number 3    
6 Source of grid definition 0 Specified in Code - oct 3.13  
7-10 Number of data points 76275    
11 Number of octets for optional list of numbers defining number of points 0 grid is regular; no appended data  
12 Interpretation of list of numbers defining number of points 0 There is no appended list  
13-14 Grid definition template number 10 Mercator  
15 Shape of the Earth 1 Earth assumed spherical with radius specified (in m) by data producer  
16 Scale factor of radius of spherical Earth 0    
17-20 Scale value of radius of spherical Earth 6371200    
21 Scale factor of major axis of oblate spheroid Earth 255    
22-25 Scaled value of major axis of oblate spheroid Earth 255    
26 Scale factor of minor axis of oblate spheroid Earth 255    
27-30 Scaled value of minor axis of oblate spheroid Earth 255    
31-34 Nj—number of points along a parallel 339    
35-38 Nj—number of points along a meridian 225    
39-42 La1 ― latitude of first grid point 16977500    
43-46 Lo1 ― longitude of first grid point 291972200    
47 Resolution and component flags 0 i direction increments not given, j direction increments not given, Resolved u and v components of vector quantities relative to easterly and northerly directions convert value to binary to read meaning in table 3.3
48-51 LaD — latitude(s) at which the Mercator projection intersects the Earth (Latitude(s) where Di and Dj are specified) 20000000    
52-55 La2 ― latitude of last grid point 19522100    
56-59 Lo2 — longitude of last grid point 296015600    
60 Scanning mode 80 Points in the first row or column scan in the +i (+x) direction. Points in the first row or column scan in the +j  (+y) direction. Adjacent points in the j (x) direction are consecutive. Adjacent rows scan in the opposite direction. convert value to binary to read in table 3.4 (64 = 01010000)
61-64 Orientation of the grid, angle between i direction on the map and the Equator 295000000   Limited to the range of 0 to 90 degrees; if the angle of orientation of the grid is neither 0 nor 90 degrees, Di and Dj must be equal to each other
65-68 Dj — longitudinal direction grid length 1250000   Grid lengths are in units of 10-3 m, at the latitude specified by LaD
69-72 Dj ― latitudinal direction grid length 1250000   Grid lengths are in units of 10-3 m, at the latitude specified by LaD

Oceanic

octet(s) content value meaning notes
1-4 Length of the section 72    
5 section number 3    
6 Source of grid definition 0 Specified in Code - oct 3.13  
7-10 Number of data points 4573389    
11 Number of octets for optional list of numbers defining number of points 0 grid is regular; no appended data  
12 Interpretation of list of numbers defining number of points 0 There is no appended list  
13-14 Grid definition template number 10 Mercator  
15 Shape of the Earth 1 Earth assumed spherical with radius specified (in m) by data producer  
16 Scale factor of radius of spherical Earth 0    
17-20 Scale value of radius of spherical Earth 6371200    
21 Scale factor of major axis of oblate spheroid Earth 255    
22-25 Scaled value of major axis of oblate spheroid Earth 255    
26 Scale factor of minor axis of oblate spheroid Earth 255    
27-30 Scaled value of minor axis of oblate spheroid Earth 255    
31-34 Nj—number of points along a parallel 2517    
35-38 Nj—number of points along a meridian 1817    
39-42 La1 ― latitude of first grid point 2177902848    
43-46 Lo1 ― longitude of first grid point 129905800    
47 Resolution and component flags 48 i direction increments given, j direction increments given, Resolved u and v components of vector quantities relative to easterly and northerly directions convert value to binary to read meaning in table 3.3
48-51 LaD — latitude(s) at which the Mercator projection intersects the Earth (Latitude(s) where Di and Dj are specified) 20000000    
52-55 La2 ― latitude of last grid point 80383000    
56-59 Lo2 — longitude of last grid point 10689200    
60 Scanning mode 80 Points in the first row or column scan in the +i (+x) direction. Points in the first row or column scan in the +j  (+y) direction. Adjacent points in the j (x) direction are  consecutive. Adjacent rows scan in the opposite direction. convert value to binary to read in table 3.4 (64 = 01010000)
61-64 Orientation of the grid, angle between i direction on the map and the Equator 0   Limited to the range of 0 to 90 degrees; if the angle of orientation of the grid is neither 0 nor 90 degrees, Di and Dj must be equal to each other
65-68 Dj — longitudinal direction grid length 10000000   Grid lengths are in units of 10-3 m, at the latitude specified by LaD
69-72 Dj ― latitudinal direction grid length 10000000   Grid lengths are in units of 10-3 m, at the latitude specified by LaD

.

IS4: Product Definition Section

appt

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 0 Temperature  
11 Parameter number 21 Apparent Temperature ** : K : APTMP  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 103 Specified Height Level Above Ground : m  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 2    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

cape

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 7 Thermodynamic Stability indicies  
11 Parameter number 6 Convective Available Potential Energy : J kg-1 : CAPE  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

cig

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 6 Cloud  
11 Parameter number 13 Ceiling : m : CEIL  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 215 Cloud ceiling  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

cigp_lt1000

octet(s) content value meaning notes
1-4 length of section in octets 47    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 5 Probability forecasts at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 6 Cloud  
11 Parameter number 13 Ceiling : m : CEIL  
12 Type of generating process 5 Probability Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identified 108 Localized Aviation MOS Program (LAMP)  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 215 Cloud ceiling  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Forecastprobability number 3    
36 Total number of forecast probabilities 7    
37 Probability type 0 Probability of event below lower limit  
38 Scale factor of lower limit 2    
39-42 Scaled value of lower limit 30480    
43 Scale factor of upper limit 255    
44-47 Scaled value ofupper limit 255    

cigp_lt500

octet(s) content value meaning notes
1-4 length of section in octets 47    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 5 Probability forecasts at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 6 Cloud  
11 Parameter number 13 Ceiling : m : CEIL  
12 Type of generating process 5 Probability Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identified 108 Localized Aviation MOS Program (LAMP)  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 215 Cloud ceiling  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Forecastprobability number 2    
36 Total number of forecast probabilities 7    
37 Probability type 0 Probability of event below lower limit  
38 Scale factor of lower limit 2    
39-42 Scaled value of lower limit 15240    
43 Scale factor of upper limit 255    
44-47 Scaled value ofupper limit 255    

cigp_lte3000

octet(s) content value meaning notes
1-4 length of section in octets 47    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 5 Probability forecasts at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 6 Cloud  
11 Parameter number 13 Ceiling : m : CEIL  
12 Type of generating process 5 Probability Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identified 108 Localized Aviation MOS Program (LAMP)  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 215 Cloud ceiling  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Forecastprobability number 5    
36 Total number of forecast probabilities 7    
37 Probability type 0 Probability of event below lower limit  
38 Scale factor of lower limit 2    
39-42 Scaled value of lower limit 91450    
43 Scale factor of upper limit 255    
44-47 Scaled value ofupper limit 255    

cldbse

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 6 Cloud  
11 Parameter number 13 Ceiling : m : CEIL  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 2 Cloud Base Level  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

cwasp

octet(s) content value meaning notes
1-4 length of section in octets 36    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 2 Derived forecasts based on all ensemble members at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 19 Physical atmospheric properties  
11 Parameter number 239 Craven-Wiedenfeld Aggregate Severe Parameter : Numeric : CWASP  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Derived forecast 241 NotFound  
36 Number of forecasts in the ensemble 241    

dewp

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 0 Temperature  
11 Parameter number 6 Dew Point Temperature : K : DPT  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 103 Specified Height Level Above Ground : m  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 2    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

dryts03

octet(s) content value meaning notes
1-4 length of section in octets 71    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 9 Probability forecasts at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 19 Physical atmospheric properties  
11 Parameter number 237 Dry Thunderstorm Probability : % : DRYTPROB  
12 Type of generating process 5 Probability Forecast  
13 Background generating process identifier 0    
14 Forecast generating process identifier 113 Products from NCEP SREF processing  
15-16 Hours after reference time data cutoff 0    
17 Minutes after reference time data cutoff 0    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Forecast probability number 0    
36 Total number of forecast probabilities 21    
37 Probability Type 1 Probability of event above upper limit  
38 Scale factor of lower limit 0    
39-42 Scaled value of lower limit 0    
43 Scale factor of upper limit 0    
44-47 Scaled value of upper limit 0    
48-49 Year of end of overall time interval varies    
50 Month of end of overall time interval varies    
51 Day of end of overall time interval varies    
52 Hour of end of overall time interval varies    
53 Minute of end of overall time interval varies    
54 Second of end of overall time interval varies    
55 nnumber of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
56-59 Total number of data values missing in the statistical process 0    
60 Statistical process used to calculate the processed field from the field at each time increment during the time range 1 Accumulation(see Note 1)  
61 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
62 Indicator of unit of time for time range over which statistical processing is done 1 Hour  
63-66 Length of the time range over which statistical processing is done, in units defined by the previous octet 3    
67 Indicator of unit of time for the increment between the successive fields used 1 Hour  
68-71 Time increment between successive fields, in units defined by the previous octet 0    

dswrf

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 4 Short-wave radiation  
11 Parameter number 7 Downward Short-Wave Radiation Flux : W m-2 : DSWRF  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

echotop

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 16 Forecast Radar Imagery  
11 Parameter number 3 Echo Top (See Note 1) : m : RETOP  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 3 Level of Cloud Tops  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

ellrod

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 19 Physical atmospheric properties  
11 Parameter number 238 Ellrod Index : ELLINX  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 100 Isobaric Surface : Pa  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 40000    
29 Type of second fixed surfaced 100 Isobaric Surface : Pa  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 30000    

flatice01

octet(s) content value meaning notes
1-4 length of section in octets 58    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 8 Average, accumulation, extreme values or other statistically processed values at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 1 Moisture  
11 Parameter number 228 Flat Ice Accumulation (FRAM) : kg m-2 : FICEAC  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35-36 YearTime of end of overall time interval varies    
37 MonthTime of end of overall time interval varies    
38 DayTime of end of overall time interval varies    
39 HourTime of end of overall time interval varies    
40 MinuteTime of end of overall time interval varies    
41 SecondTime of end of overall time interval varies    
42 n - number of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
43-46 Total number of data values missing in statistical process 0    
47 Statistical process used to calculate the processed field from the field at each time increment during the time range 1 Accumulation(see Note 1)  
48 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
49 Indicator of unit of time for time range over which statistical processing is done 1 Hour  
50-53 Length of the time range over which statistical processing is done, in units defined by the previous octet 1    
54 Indicator of unit of time for the increment between the successive fields used 1 Hour  
55-58 Time increment between successive fields, in units defined by the previous octet 0    

frzspray

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 3 Mass  
11 Parameter number 204 Y-gradient of Height : m-1 : HGTY  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

haines_analysis

octet(s) content value meaning notes
1-4 length of section in octets 36    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 2 Derived forecasts based on all ensemble members at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 4 Short-wave radiation  
11 Parameter number 2 Short-Wave Radiation Flux* : W m-2 : SWAVR  
12 Type of generating process 0 Analysis  
13 Background generating process identifier 255    
14 Forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 200 Entire atmosphere (considered as a single layer)  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Derived forecast 241 NotFound  
36 Number of forecasts in the ensemble 241    

ice24_50p

octet(s) content value meaning notes
1-4 length of section in octets 59    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 10 Percentile forecasts at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 1 Moisture  
11 Parameter number 228 Flat Ice Accumulation (FRAM) : kg m-2 : FICEAC  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identifier 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by previous octet varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Percentile value 50    
36-37 Year of end of overall time interval varies    
38 Month of end of overall time interval varies    
39 Day of end of overall time overall time interval varies    
40 Hour of end of overall time interval varies    
41 Minute of end overall time interval 0    
42 Second of end of overall time interval varies    
43 nnumber of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
44-47 Total number of data values missing in the statistical process 0    
48 Statistical process used to calculate the processed field from the field at each time increment during the time range 1 Accumulation(see Note 1)  
49 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
50 Indicator of unit of time range over which statistical processing is done 1 Hour  
51-54 Length of the time range over which statistical processing is done, in units defined by the previous octet 24    
55 Indicator of unit of time for the increment between the successive fields used 1 Hour  
56-59 Time increment between successive fields, in units defined by the previous octet 24    

ice24prb001

octet(s) content value meaning notes
1-4 length of section in octets 71    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 9 Probability forecasts at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 1 Moisture  
11 Parameter number 228 Flat Ice Accumulation (FRAM) : kg m-2 : FICEAC  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identifier 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Forecast probability number 255    
36 Total number of forecast probabilities 255    
37 Probability Type 1 Probability of event above upper limit  
38 Scale factor of lower limit 255    
39-42 Scaled value of lower limit 255    
43 Scale factor of upper limit 3    
44-47 Scaled value of upper limit 254    
48-49 Year of end of overall time interval varies    
50 Month of end of overall time interval varies    
51 Day of end of overall time interval varies    
52 Hour of end of overall time interval varies    
53 Minute of end of overall time interval varies    
54 Second of end of overall time interval varies    
55 nnumber of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
56-59 Total number of data values missing in the statistical process 0    
60 Statistical process used to calculate the processed field from the field at each time increment during the time range 1 Accumulation(see Note 1)  
61 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
62 Indicator of unit of time for time range over which statistical processing is done 1 Hour  
63-66 Length of the time range over which statistical processing is done, in units defined by the previous octet 24    
67 Indicator of unit of time for the increment between the successive fields used 1 Hour  
68-71 Time increment between successive fields, in units defined by the previous octet 0    

ice48_50p

octet(s) content value meaning notes
1-4 length of section in octets 59    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 10 Percentile forecasts at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 1 Moisture  
11 Parameter number 228 Flat Ice Accumulation (FRAM) : kg m-2 : FICEAC  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identifier 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by previous octet varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Percentile value 50    
36-37 Year of end of overall time interval varies    
38 Month of end of overall time interval varies    
39 Day of end of overall time overall time interval varies    
40 Hour of end of overall time interval varies    
41 Minute of end overall time interval 0    
42 Second of end of overall time interval varies    
43 nnumber of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
44-47 Total number of data values missing in the statistical process 0    
48 Statistical process used to calculate the processed field from the field at each time increment during the time range 1 Accumulation(see Note 1)  
49 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
50 Indicator of unit of time range over which statistical processing is done 1 Hour  
51-54 Length of the time range over which statistical processing is done, in units defined by the previous octet 48    
55 Indicator of unit of time for the increment between the successive fields used 1 Hour  
56-59 Time increment between successive fields, in units defined by the previous octet 48    

ice48prb001

octet(s) content value meaning notes
1-4 length of section in octets 71    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 9 Probability forecasts at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 1 Moisture  
11 Parameter number 228 Flat Ice Accumulation (FRAM) : kg m-2 : FICEAC  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identifier 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Forecast probability number 255    
36 Total number of forecast probabilities 255    
37 Probability Type 1 Probability of event above upper limit  
38 Scale factor of lower limit 255    
39-42 Scaled value of lower limit 255    
43 Scale factor of upper limit 3    
44-47 Scaled value of upper limit 254    
48-49 Year of end of overall time interval varies    
50 Month of end of overall time interval varies    
51 Day of end of overall time interval varies    
52 Hour of end of overall time interval varies    
53 Minute of end of overall time interval varies    
54 Second of end of overall time interval varies    
55 nnumber of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
56-59 Total number of data values missing in the statistical process 0    
60 Statistical process used to calculate the processed field from the field at each time increment during the time range 1 Accumulation(see Note 1)  
61 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
62 Indicator of unit of time for time range over which statistical processing is done 1 Hour  
63-66 Length of the time range over which statistical processing is done, in units defined by the previous octet 48    
67 Indicator of unit of time for the increment between the successive fields used 1 Hour  
68-71 Time increment between successive fields, in units defined by the previous octet 0    

ice72_50p

octet(s) content value meaning notes
1-4 length of section in octets 59    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 10 Percentile forecasts at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 1 Moisture  
11 Parameter number 228 Flat Ice Accumulation (FRAM) : kg m-2 : FICEAC  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identifier 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by previous octet varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Percentile value 50    
36-37 Year of end of overall time interval varies    
38 Month of end of overall time interval varies    
39 Day of end of overall time overall time interval varies    
40 Hour of end of overall time interval varies    
41 Minute of end overall time interval 0    
42 Second of end of overall time interval varies    
43 nnumber of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
44-47 Total number of data values missing in the statistical process 0    
48 Statistical process used to calculate the processed field from the field at each time increment during the time range 1 Accumulation(see Note 1)  
49 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
50 Indicator of unit of time range over which statistical processing is done 1 Hour  
51-54 Length of the time range over which statistical processing is done, in units defined by the previous octet 72    
55 Indicator of unit of time for the increment between the successive fields used 1 Hour  
56-59 Time increment between successive fields, in units defined by the previous octet 72    

ice72prb001

octet(s) content value meaning notes
1-4 length of section in octets 71    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 9 Probability forecasts at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 1 Moisture  
11 Parameter number 228 Flat Ice Accumulation (FRAM) : kg m-2 : FICEAC  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identifier 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Forecast probability number 255    
36 Total number of forecast probabilities 255    
37 Probability Type 1 Probability of event above upper limit  
38 Scale factor of lower limit 255    
39-42 Scaled value of lower limit 255    
43 Scale factor of upper limit 3    
44-47 Scaled value of upper limit 254    
48-49 Year of end of overall time interval varies    
50 Month of end of overall time interval varies    
51 Day of end of overall time interval varies    
52 Hour of end of overall time interval varies    
53 Minute of end of overall time interval varies    
54 Second of end of overall time interval varies    
55 nnumber of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
56-59 Total number of data values missing in the statistical process 0    
60 Statistical process used to calculate the processed field from the field at each time increment during the time range 1 Accumulation(see Note 1)  
61 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
62 Indicator of unit of time for time range over which statistical processing is done 1 Hour  
63-66 Length of the time range over which statistical processing is done, in units defined by the previous octet 72    
67 Indicator of unit of time for the increment between the successive fields used 1 Hour  
68-71 Time increment between successive fields, in units defined by the previous octet 0    

llturb

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 19 Physical atmospheric properties  
11 Parameter number 10 Turbulence : (See Table 4.208 for units) : TURB  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 103 Specified Height Level Above Ground : m  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 1372    

llwsdir

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 2 Momentum  
11 Parameter number 0 Wind Direction (from which blowing) : WDIR  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 103 Specified Height Level Above Ground : m  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 610    

llwshgt

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 3 Mass  
11 Parameter number 6 Geometric Height : m : DIST  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 103 Specified Height Level Above Ground : m  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 610    

llwsspd

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 2 Momentum  
11 Parameter number 1 Wind Speed : m s-1 : WIND  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 103 Specified Height Level Above Ground : m  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 610    

maxffwi

octet(s) content value meaning notes
1-4 length of section in octets 58    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 8 Average, accumulation, extreme values or other statistically processed values at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 4 Short-wave radiation  
11 Parameter number 4 Brightness Temperature : K : BRTMP  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 2    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35-36 YearTime of end of overall time interval varies    
37 MonthTime of end of overall time interval varies    
38 DayTime of end of overall time interval varies    
39 HourTime of end of overall time interval varies    
40 MinuteTime of end of overall time interval varies    
41 SecondTime of end of overall time interval varies    
42 n - number of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
43-46 Total number of data values missing in statistical process 0    
47 Statistical process used to calculate the processed field from the field at each time increment during the time range 2 Maximum  
48 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
49 Indicator of unit of time for time range over which statistical processing is done 1 Hour  
50-53 Length of the time range over which statistical processing is done, in units defined by the previous octet 6    
54 Indicator of unit of time for the increment between the successive fields used 1 Hour  
55-58 Time increment between successive fields, in units defined by the previous octet 0    

maxhi

octet(s) content value meaning notes
1-4 length of section in octets 58    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 8 Average, accumulation, extreme values or other statistically processed values at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 4 Short-wave radiation  
11 Parameter number 2 Short-Wave Radiation Flux* : W m-2 : SWAVR  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 200 Entire atmosphere (considered as a single layer)  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35-36 YearTime of end of overall time interval varies    
37 MonthTime of end of overall time interval varies    
38 DayTime of end of overall time interval varies    
39 HourTime of end of overall time interval varies    
40 MinuteTime of end of overall time interval varies    
41 SecondTime of end of overall time interval varies    
42 n - number of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
43-46 Total number of data values missing in statistical process 0    
47 Statistical process used to calculate the processed field from the field at each time increment during the time range 2 Maximum  
48 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
49 Indicator of unit of time for time range over which statistical processing is done 1 Hour  
50-53 Length of the time range over which statistical processing is done, in units defined by the previous octet 6    
54 Indicator of unit of time for the increment between the successive fields used 1 Hour  
55-58 Time increment between successive fields, in units defined by the previous octet 0    

maxref

octet(s) content value meaning notes
1-4 length of section in octets 58    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 8 Average, accumulation, extreme values or other statistically processed values at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 16 Forecast Radar Imagery  
11 Parameter number 198 Hourly Maximum of Simulated Reflectivity : dB : MAXREF  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 103 Specified Height Level Above Ground : m  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 1000    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35-36 YearTime of end of overall time interval varies    
37 MonthTime of end of overall time interval varies    
38 DayTime of end of overall time interval varies    
39 HourTime of end of overall time interval varies    
40 MinuteTime of end of overall time interval varies    
41 SecondTime of end of overall time interval varies    
42 n - number of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
43-46 Total number of data values missing in statistical process 0    
47 Statistical process used to calculate the processed field from the field at each time increment during the time range 2 Maximum  
48 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
49 Indicator of unit of time for time range over which statistical processing is done 1 Hour  
50-53 Length of the time range over which statistical processing is done, in units defined by the previous octet 1    
54 Indicator of unit of time for the increment between the successive fields used 1 Hour  
55-58 Time increment between successive fields, in units defined by the previous octet 0    

maxrh

octet(s) content value meaning notes
1-4 length of section in octets 58    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 8 Average, accumulation, extreme values or other statistically processed values at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 1 Moisture  
11 Parameter number 27 Maximum Relative Humidity * : % : MAXRH  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 103 Specified Height Level Above Ground : m  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 2    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35-36 YearTime of end of overall time interval varies    
37 MonthTime of end of overall time interval varies    
38 DayTime of end of overall time interval varies    
39 HourTime of end of overall time interval varies    
40 MinuteTime of end of overall time interval varies    
41 SecondTime of end of overall time interval varies    
42 n - number of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
43-46 Total number of data values missing in statistical process 0    
47 Statistical process used to calculate the processed field from the field at each time increment during the time range 2 Maximum  
48 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
49 Indicator of unit of time for time range over which statistical processing is done 1 Hour  
50-53 Length of the time range over which statistical processing is done, in units defined by the previous octet 12    
54 Indicator of unit of time for the increment between the successive fields used 1 Hour  
55-58 Time increment between successive fields, in units defined by the previous octet 0    

maxt

octet(s) content value meaning notes
1-4 length of section in octets 58    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 8 Average, accumulation, extreme values or other statistically processed values at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 0 Temperature  
11 Parameter number 4 Maximum Temperature* : K : TMAX  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 103 Specified Height Level Above Ground : m  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 2    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35-36 YearTime of end of overall time interval varies    
37 MonthTime of end of overall time interval varies    
38 DayTime of end of overall time interval varies    
39 HourTime of end of overall time interval varies    
40 MinuteTime of end of overall time interval varies    
41 SecondTime of end of overall time interval varies    
42 n - number of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
43-46 Total number of data values missing in statistical process 0    
47 Statistical process used to calculate the processed field from the field at each time increment during the time range 2 Maximum  
48 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
49 Indicator of unit of time for time range over which statistical processing is done 1 Hour  
50-53 Length of the time range over which statistical processing is done, in units defined by the previous octet 12    
54 Indicator of unit of time for the increment between the successive fields used 1 Hour  
55-58 Time increment between successive fields, in units defined by the previous octet 0    

mixhgt

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 19 Physical atmospheric properties  
11 Parameter number 3 Mixed Layer Depth : m : MIXHT  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 200 Entire atmosphere (considered as a single layer)  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

mslp_cdf-50p

octet(s) content value meaning notes
1-4 length of section in octets 35    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 6 Percentile forecasts at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 3 Mass  
11 Parameter number 1 Pressure Reduced to MSL : Pa : PRMSL  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 101 Mean Sea Level  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Percentile value 50    

mxwbalft

octet(s) content value meaning notes
1-4 length of section in octets 37    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 15 Average, accumulation, extreme values or other statistically-processed values over a spatial area at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 0 Temperature  
11 Parameter number 27 Wet Bulb Temperature : K : WETBT  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 103 Specified Height Level Above Ground : m  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 610    
29 Type of second fixed surfaced 100 Isobaric Surface : Pa  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 40000    
35 Statistical process used within the spatial area defined by octet 36 241 NotFound  
36 Type of spatial processing used to arrive at given data value from source data 241 NotFound  
37 Number of data points used in spatial processing defined in octet 36 241    

negengy

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 7 Thermodynamic Stability indicies  
11 Parameter number 201 Bourgoiun Negative Energy Layer (surface to freezing level) : J kg-1 : BNEGELAY  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 4 Level of 0oC Isotherm  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

pdur

octet(s) content value meaning notes
1-4 length of section in octets 58    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 8 Average, accumulation, extreme values or other statistically processed values at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 1 Moisture  
11 Parameter number 234 Precipitation Duration : hour : PCPDUR  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35-36 YearTime of end of overall time interval varies    
37 MonthTime of end of overall time interval varies    
38 DayTime of end of overall time interval varies    
39 HourTime of end of overall time interval varies    
40 MinuteTime of end of overall time interval varies    
41 SecondTime of end of overall time interval varies    
42 n - number of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
43-46 Total number of data values missing in statistical process 0    
47 Statistical process used to calculate the processed field from the field at each time increment during the time range 1 Accumulation(see Note 1)  
48 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
49 Indicator of unit of time for time range over which statistical processing is done 1 Hour  
50-53 Length of the time range over which statistical processing is done, in units defined by the previous octet 12    
54 Indicator of unit of time for the increment between the successive fields used 1 Hour  
55-58 Time increment between successive fields, in units defined by the previous octet 0    

pop06

octet(s) content value meaning notes
1-4 length of section in octets 71    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 9 Probability forecasts at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 1 Moisture  
11 Parameter number 8 Total Precipitation *** : kg m-2 : APCP  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identifier 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Forecast probability number 255    
36 Total number of forecast probabilities 255    
37 Probability Type 1 Probability of event above upper limit  
38 Scale factor of lower limit 255    
39-42 Scaled value of lower limit 255    
43 Scale factor of upper limit 3    
44-47 Scaled value of upper limit 254    
48-49 Year of end of overall time interval varies    
50 Month of end of overall time interval varies    
51 Day of end of overall time interval varies    
52 Hour of end of overall time interval varies    
53 Minute of end of overall time interval varies    
54 Second of end of overall time interval varies    
55 nnumber of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
56-59 Total number of data values missing in the statistical process 0    
60 Statistical process used to calculate the processed field from the field at each time increment during the time range 1 Accumulation(see Note 1)  
61 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
62 Indicator of unit of time for time range over which statistical processing is done 1 Hour  
63-66 Length of the time range over which statistical processing is done, in units defined by the previous octet 6    
67 Indicator of unit of time for the increment between the successive fields used 1 Hour  
68-71 Time increment between successive fields, in units defined by the previous octet 0    

posengy

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 7 Thermodynamic Stability indicies  
11 Parameter number 202 Bourgoiun Positive Energy Layer (2k ft AGL to 400 hPa) : J kg-1 : BPOSELAY  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 103 Specified Height Level Above Ground : m  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 610    
29 Type of second fixed surfaced 100 Isobaric Surface : Pa  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 40000    

prb0p25frzn

octet(s) content value meaning notes
1-4 length of section in octets 71    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 9 Probability forecasts at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 1 Moisture  
11 Parameter number 53 Total Snowfall Rate Water Equivalent ** : kg m-2s-1 : TSRWE  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identifier 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Forecast probability number 255    
36 Total number of forecast probabilities 255    
37 Probability Type 1 Probability of event above upper limit  
38 Scale factor of lower limit 255    
39-42 Scaled value of lower limit 255    
43 Scale factor of upper limit 7    
44-47 Scaled value of upper limit 735    
48-49 Year of end of overall time interval varies    
50 Month of end of overall time interval varies    
51 Day of end of overall time interval varies    
52 Hour of end of overall time interval varies    
53 Minute of end of overall time interval varies    
54 Second of end of overall time interval varies    
55 nnumber of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
56-59 Total number of data values missing in the statistical process 0    
60 Statistical process used to calculate the processed field from the field at each time increment during the time range 1 Accumulation(see Note 1)  
61 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
62 Indicator of unit of time for time range over which statistical processing is done 1 Hour  
63-66 Length of the time range over which statistical processing is done, in units defined by the previous octet 24    
67 Indicator of unit of time for the increment between the successive fields used 1 Hour  
68-71 Time increment between successive fields, in units defined by the previous octet 0    

predomwx

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 1 Moisture  
11 Parameter number 226 Pblackominant Weather (see Note 1) : Numeric : PWTHER  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 0 Reserved  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

prfzrn

octet(s) content value meaning notes
1-4 length of section in octets 47    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 5 Probability forecasts at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 1 Moisture  
11 Parameter number 19 Precipitation Type : (See Table 4.201 for units) : PTYPE  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Forecastprobability number 1    
36 Total number of forecast probabilities 1    
37 Probability type 2 Probability of event between upper and lower limits (the range includes lower limit but not the upper limit)  
38 Scale factor of lower limit 0    
39-42 Scaled value of lower limit 3    
43 Scale factor of upper limit 0    
44-47 Scaled value ofupper limit 4    

probiceprsnt

octet(s) content value meaning notes
1-4 length of section in octets 47    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 5 Probability forecasts at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 1 Moisture  
11 Parameter number 232 Probability Cloud Ice Present : % : PROBCIP  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 10 Entire Atmosphere  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Forecastprobability number 1    
36 Total number of forecast probabilities 1    
37 Probability type 3 Probability of event above lower limit  
38 Scale factor of lower limit 0    
39-42 Scaled value of lower limit 0    
43 Scale factor of upper limit 255    
44-47 Scaled value ofupper limit 255    

probrefzslt

octet(s) content value meaning notes
1-4 length of section in octets 47    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 5 Probability forecasts at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 1 Moisture  
11 Parameter number 19 Precipitation Type : (See Table 4.201 for units) : PTYPE  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 10 Entire Atmosphere  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Forecastprobability number 1    
36 Total number of forecast probabilities 1    
37 Probability type 2 Probability of event between upper and lower limits (the range includes lower limit but not the upper limit)  
38 Scale factor of lower limit 0    
39-42 Scaled value of lower limit 8    
43 Scale factor of upper limit 0    
44-47 Scaled value ofupper limit 9    

prrain

octet(s) content value meaning notes
1-4 length of section in octets 47    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 5 Probability forecasts at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 1 Moisture  
11 Parameter number 19 Precipitation Type : (See Table 4.201 for units) : PTYPE  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Forecastprobability number 1    
36 Total number of forecast probabilities 1    
37 Probability type 2 Probability of event between upper and lower limits (the range includes lower limit but not the upper limit)  
38 Scale factor of lower limit 0    
39-42 Scaled value of lower limit 1    
43 Scale factor of upper limit 0    
44-47 Scaled value ofupper limit 2    

prsleet

octet(s) content value meaning notes
1-4 length of section in octets 47    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 5 Probability forecasts at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 1 Moisture  
11 Parameter number 19 Precipitation Type : (See Table 4.201 for units) : PTYPE  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Forecastprobability number 1    
36 Total number of forecast probabilities 1    
37 Probability type 2 Probability of event between upper and lower limits (the range includes lower limit but not the upper limit)  
38 Scale factor of lower limit 0    
39-42 Scaled value of lower limit 8    
43 Scale factor of upper limit 0    
44-47 Scaled value ofupper limit 9    

prsnow

octet(s) content value meaning notes
1-4 length of section in octets 47    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 5 Probability forecasts at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 1 Moisture  
11 Parameter number 19 Precipitation Type : (See Table 4.201 for units) : PTYPE  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Forecastprobability number 1    
36 Total number of forecast probabilities 1    
37 Probability type 2 Probability of event between upper and lower limits (the range includes lower limit but not the upper limit)  
38 Scale factor of lower limit 0    
39-42 Scaled value of lower limit 5    
43 Scale factor of upper limit 0    
44-47 Scaled value ofupper limit 7    

ptstm06

octet(s) content value meaning notes
1-4 length of section in octets 58    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 8 Average, accumulation, extreme values or other statistically processed values at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 19 Physical atmospheric properties  
11 Parameter number 2 Thunderstorm Probability : % : TSTM  
12 Type of generating process 5 Probability Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35-36 YearTime of end of overall time interval varies    
37 MonthTime of end of overall time interval varies    
38 DayTime of end of overall time interval varies    
39 HourTime of end of overall time interval varies    
40 MinuteTime of end of overall time interval varies    
41 SecondTime of end of overall time interval varies    
42 n - number of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
43-46 Total number of data values missing in statistical process 0    
47 Statistical process used to calculate the processed field from the field at each time increment during the time range 1 Accumulation(see Note 1)  
48 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
49 Indicator of unit of time for time range over which statistical processing is done 1 Hour  
50-53 Length of the time range over which statistical processing is done, in units defined by the previous octet 6    
54 Indicator of unit of time for the increment between the successive fields used 1 Hour  
55-58 Time increment between successive fields, in units defined by the previous octet 0    

qpf06

octet(s) content value meaning notes
1-4 length of section in octets 58    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 8 Average, accumulation, extreme values or other statistically processed values at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 1 Moisture  
11 Parameter number 8 Total Precipitation *** : kg m-2 : APCP  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35-36 YearTime of end of overall time interval varies    
37 MonthTime of end of overall time interval varies    
38 DayTime of end of overall time interval varies    
39 HourTime of end of overall time interval varies    
40 MinuteTime of end of overall time interval varies    
41 SecondTime of end of overall time interval varies    
42 n - number of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
43-46 Total number of data values missing in statistical process 0    
47 Statistical process used to calculate the processed field from the field at each time increment during the time range 1 Accumulation(see Note 1)  
48 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
49 Indicator of unit of time for time range over which statistical processing is done 1 Hour  
50-53 Length of the time range over which statistical processing is done, in units defined by the previous octet 6    
54 Indicator of unit of time for the increment between the successive fields used 1 Hour  
55-58 Time increment between successive fields, in units defined by the previous octet 0    

rh

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 1 Moisture  
11 Parameter number 1 Relative Humidity : % : RH  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 103 Specified Height Level Above Ground : m  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 2    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

sigwv

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 0 Temperature  
11 Parameter number 3 Pseudo-Adiabatic Potential Temperature (or Equivalent Potential Temperature) : K : EPOT  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

sky

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 6 Cloud  
11 Parameter number 1 Total Cloud Cover : % : TCDC  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

slrblend

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 1 Moisture  
11 Parameter number 233 Snow Liquid ratio : kg kg-1 : SNOWLR  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

snow06

octet(s) content value meaning notes
1-4 length of section in octets 58    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 8 Average, accumulation, extreme values or other statistically processed values at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 1 Moisture  
11 Parameter number 29 Total Snowfall *** : m : ASNOW  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35-36 YearTime of end of overall time interval varies    
37 MonthTime of end of overall time interval varies    
38 DayTime of end of overall time interval varies    
39 HourTime of end of overall time interval varies    
40 MinuteTime of end of overall time interval varies    
41 SecondTime of end of overall time interval varies    
42 n - number of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
43-46 Total number of data values missing in statistical process 0    
47 Statistical process used to calculate the processed field from the field at each time increment during the time range 1 Accumulation(see Note 1)  
48 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
49 Indicator of unit of time for time range over which statistical processing is done 1 Hour  
50-53 Length of the time range over which statistical processing is done, in units defined by the previous octet 6    
54 Indicator of unit of time for the increment between the successive fields used 1 Hour  
55-58 Time increment between successive fields, in units defined by the previous octet 0    

snow24_50p

octet(s) content value meaning notes
1-4 length of section in octets 59    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 10 Percentile forecasts at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 1 Moisture  
11 Parameter number 29 Total Snowfall *** : m : ASNOW  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identifier 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by previous octet varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Percentile value 50    
36-37 Year of end of overall time interval varies    
38 Month of end of overall time interval varies    
39 Day of end of overall time overall time interval varies    
40 Hour of end of overall time interval varies    
41 Minute of end overall time interval 0    
42 Second of end of overall time interval varies    
43 nnumber of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
44-47 Total number of data values missing in the statistical process 0    
48 Statistical process used to calculate the processed field from the field at each time increment during the time range 1 Accumulation(see Note 1)  
49 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
50 Indicator of unit of time range over which statistical processing is done 1 Hour  
51-54 Length of the time range over which statistical processing is done, in units defined by the previous octet 24    
55 Indicator of unit of time for the increment between the successive fields used 1 Hour  
56-59 Time increment between successive fields, in units defined by the previous octet 24    

snow24prb180

octet(s) content value meaning notes
1-4 length of section in octets 71    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 9 Probability forecasts at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 1 Moisture  
11 Parameter number 29 Total Snowfall *** : m : ASNOW  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identifier 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Forecast probability number 255    
36 Total number of forecast probabilities 255    
37 Probability Type 1 Probability of event above upper limit  
38 Scale factor of lower limit 255    
39-42 Scaled value of lower limit 255    
43 Scale factor of upper limit 4    
44-47 Scaled value of upper limit 4572    
48-49 Year of end of overall time interval varies    
50 Month of end of overall time interval varies    
51 Day of end of overall time interval varies    
52 Hour of end of overall time interval varies    
53 Minute of end of overall time interval varies    
54 Second of end of overall time interval varies    
55 nnumber of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
56-59 Total number of data values missing in the statistical process 0    
60 Statistical process used to calculate the processed field from the field at each time increment during the time range 1 Accumulation(see Note 1)  
61 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
62 Indicator of unit of time for time range over which statistical processing is done 1 Hour  
63-66 Length of the time range over which statistical processing is done, in units defined by the previous octet 24    
67 Indicator of unit of time for the increment between the successive fields used 1 Hour  
68-71 Time increment between successive fields, in units defined by the previous octet 0    

snow48_50p

octet(s) content value meaning notes
1-4 length of section in octets 59    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 10 Percentile forecasts at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 1 Moisture  
11 Parameter number 29 Total Snowfall *** : m : ASNOW  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identifier 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by previous octet varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Percentile value 50    
36-37 Year of end of overall time interval varies    
38 Month of end of overall time interval varies    
39 Day of end of overall time overall time interval varies    
40 Hour of end of overall time interval varies    
41 Minute of end overall time interval 0    
42 Second of end of overall time interval varies    
43 nnumber of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
44-47 Total number of data values missing in the statistical process 0    
48 Statistical process used to calculate the processed field from the field at each time increment during the time range 1 Accumulation(see Note 1)  
49 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
50 Indicator of unit of time range over which statistical processing is done 1 Hour  
51-54 Length of the time range over which statistical processing is done, in units defined by the previous octet 48    
55 Indicator of unit of time for the increment between the successive fields used 1 Hour  
56-59 Time increment between successive fields, in units defined by the previous octet 48    

snow48prb180

octet(s) content value meaning notes
1-4 length of section in octets 71    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 9 Probability forecasts at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 1 Moisture  
11 Parameter number 29 Total Snowfall *** : m : ASNOW  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identifier 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Forecast probability number 255    
36 Total number of forecast probabilities 255    
37 Probability Type 1 Probability of event above upper limit  
38 Scale factor of lower limit 255    
39-42 Scaled value of lower limit 255    
43 Scale factor of upper limit 4    
44-47 Scaled value of upper limit 4572    
48-49 Year of end of overall time interval varies    
50 Month of end of overall time interval varies    
51 Day of end of overall time interval varies    
52 Hour of end of overall time interval varies    
53 Minute of end of overall time interval varies    
54 Second of end of overall time interval varies    
55 nnumber of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
56-59 Total number of data values missing in the statistical process 0    
60 Statistical process used to calculate the processed field from the field at each time increment during the time range 1 Accumulation(see Note 1)  
61 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
62 Indicator of unit of time for time range over which statistical processing is done 1 Hour  
63-66 Length of the time range over which statistical processing is done, in units defined by the previous octet 48    
67 Indicator of unit of time for the increment between the successive fields used 1 Hour  
68-71 Time increment between successive fields, in units defined by the previous octet 0    

snow72_50p

octet(s) content value meaning notes
1-4 length of section in octets 59    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 10 Percentile forecasts at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 1 Moisture  
11 Parameter number 29 Total Snowfall *** : m : ASNOW  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identifier 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by previous octet varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Percentile value 50    
36-37 Year of end of overall time interval varies    
38 Month of end of overall time interval varies    
39 Day of end of overall time overall time interval varies    
40 Hour of end of overall time interval varies    
41 Minute of end overall time interval 0    
42 Second of end of overall time interval varies    
43 nnumber of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
44-47 Total number of data values missing in the statistical process 0    
48 Statistical process used to calculate the processed field from the field at each time increment during the time range 1 Accumulation(see Note 1)  
49 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
50 Indicator of unit of time range over which statistical processing is done 1 Hour  
51-54 Length of the time range over which statistical processing is done, in units defined by the previous octet 72    
55 Indicator of unit of time for the increment between the successive fields used 1 Hour  
56-59 Time increment between successive fields, in units defined by the previous octet 72    

snow72prb180

octet(s) content value meaning notes
1-4 length of section in octets 71    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 9 Probability forecasts at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 1 Moisture  
11 Parameter number 29 Total Snowfall *** : m : ASNOW  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identifier 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Forecast probability number 255    
36 Total number of forecast probabilities 255    
37 Probability Type 1 Probability of event above upper limit  
38 Scale factor of lower limit 255    
39-42 Scaled value of lower limit 255    
43 Scale factor of upper limit 4    
44-47 Scaled value of upper limit 4572    
48-49 Year of end of overall time interval varies    
50 Month of end of overall time interval varies    
51 Day of end of overall time interval varies    
52 Hour of end of overall time interval varies    
53 Minute of end of overall time interval varies    
54 Second of end of overall time interval varies    
55 nnumber of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
56-59 Total number of data values missing in the statistical process 0    
60 Statistical process used to calculate the processed field from the field at each time increment during the time range 1 Accumulation(see Note 1)  
61 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
62 Indicator of unit of time for time range over which statistical processing is done 1 Hour  
63-66 Length of the time range over which statistical processing is done, in units defined by the previous octet 72    
67 Indicator of unit of time for the increment between the successive fields used 1 Hour  
68-71 Time increment between successive fields, in units defined by the previous octet 0    

snowlvl

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 19 Physical atmospheric properties  
11 Parameter number 236 Snow Level : m : SNOWLVL  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 102 Specific Altitude Above Mean Sea Level : m  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

spc_sref_dryts03

octet(s) content value meaning notes
1-4 length of section in octets 71    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 9 Probability forecasts at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval  
10 Parameter category 19 Physical atmospheric properties  
11 Parameter number 237 Dry Thunderstorm Probability : % : DRYTPROB  
12 Type of generating process 5 Probability Forecast  
13 Background generating process identifier 0    
14 Forecast generating process identifier 113 Products from NCEP SREF processing  
15-16 Hours after reference time data cutoff 0    
17 Minutes after reference time data cutoff 0    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Forecast probability number 0    
36 Total number of forecast probabilities 21    
37 Probability Type 1 Probability of event above upper limit  
38 Scale factor of lower limit 0    
39-42 Scaled value of lower limit 0    
43 Scale factor of upper limit 0    
44-47 Scaled value of upper limit 0    
48-49 Year of end of overall time interval varies    
50 Month of end of overall time interval varies    
51 Day of end of overall time interval varies    
52 Hour of end of overall time interval varies    
53 Minute of end of overall time interval varies    
54 Second of end of overall time interval varies    
55 nnumber of time ranges specifications describing the time intervals used to calculate the statistically-processed field 1    
56-59 Total number of data values missing in the statistical process 0    
60 Statistical process used to calculate the processed field from the field at each time increment during the time range 1 Accumulation(see Note 1)  
61 Type of time increment between successive fields used in the statistical processing 2 Successive times processed have same start time of forecast, forecast time is incremented.  
62 Indicator of unit of time for time range over which statistical processing is done 1 Hour  
63-66 Length of the time range over which statistical processing is done, in units defined by the previous octet 3    
67 Indicator of unit of time for the increment between the successive fields used 1 Hour  
68-71 Time increment between successive fields, in units defined by the previous octet 0    

sst

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 0 Temperature  
11 Parameter number 0 Temperature : K : TMP  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

temp

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 0 Temperature  
11 Parameter number 0 Temperature : K : TMP  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 103 Specified Height Level Above Ground : m  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 2    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

trwdir

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 2 Momentum  
11 Parameter number 226 NotFound  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 200 Entire atmosphere (considered as a single layer)  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

trwspd

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 2 Momentum  
11 Parameter number 225 NotFound  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 200 Entire atmosphere (considered as a single layer)  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

vil

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 15 Radar  
11 Parameter number 3 Vertically-Integrated Liquid Water : kg m-2 : VIL  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 10 Entire Atmosphere  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

vis

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 19 Physical atmospheric properties  
11 Parameter number 0 Visibility : m : VIS  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

vis_cdf-50p

octet(s) content value meaning notes
1-4 length of section in octets 35    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 6 Percentile forecasts at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 19 Physical atmospheric properties  
11 Parameter number 0 Visibility : m : VIS  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Percentile value 50    

visp_lt1

octet(s) content value meaning notes
1-4 length of section in octets 47    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 5 Probability forecasts at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 19 Physical atmospheric properties  
11 Parameter number 0 Visibility : m : VIS  
12 Type of generating process 5 Probability Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identified 108 Localized Aviation MOS Program (LAMP)  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Forecastprobability number 2    
36 Total number of forecast probabilities 6    
37 Probability type 0 Probability of event below lower limit  
38 Scale factor of lower limit 2    
39-42 Scaled value of lower limit 160934    
43 Scale factor of upper limit 255    
44-47 Scaled value ofupper limit 255    

visp_lt3

octet(s) content value meaning notes
1-4 length of section in octets 47    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 5 Probability forecasts at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 19 Physical atmospheric properties  
11 Parameter number 0 Visibility : m : VIS  
12 Type of generating process 5 Probability Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identified 108 Localized Aviation MOS Program (LAMP)  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Forecastprobability number 4    
36 Total number of forecast probabilities 6    
37 Probability type 0 Probability of event below lower limit  
38 Scale factor of lower limit 2    
39-42 Scaled value of lower limit 482803    
43 Scale factor of upper limit 255    
44-47 Scaled value ofupper limit 255    

visp_lte5

octet(s) content value meaning notes
1-4 length of section in octets 47    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 5 Probability forecasts at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 19 Physical atmospheric properties  
11 Parameter number 0 Visibility : m : VIS  
12 Type of generating process 5 Probability Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identified 108 Localized Aviation MOS Program (LAMP)  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 1 Ground or Water Surface  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Forecastprobability number 5    
36 Total number of forecast probabilities 6    
37 Probability type 0 Probability of event below lower limit  
38 Scale factor of lower limit 2    
39-42 Scaled value of lower limit 804673    
43 Scale factor of upper limit 255    
44-47 Scaled value ofupper limit 255    

vrate

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 2 Momentum  
11 Parameter number 224 NotFound  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 200 Entire atmosphere (considered as a single layer)  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 0    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

wdir

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 2 Momentum  
11 Parameter number 0 Wind Direction (from which blowing) : WDIR  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 103 Specified Height Level Above Ground : m  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 10    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

tropical_blend

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 2 Momentum  
11 Parameter number 231 NotFound  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 103 Specified Height Level Above Ground : m  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 10    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

wdir30

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 2 Momentum  
11 Parameter number 0 Wind Direction (from which blowing) : WDIR  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 103 Specified Height Level Above Ground : m  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 30    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 255    
31-34 Scaled value of second fixed surfaces 4294967295    

wdir30_cdf-50p

octet(s) content value meaning notes
1-4 length of section in octets 35    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 6 Percentile forecasts at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 2 Momentum  
11 Parameter number 0 Wind Direction (from which blowing) : WDIR  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 103 Specified Height Level Above Ground : m  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 30    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 255    
31-34 Scaled value of second fixed surfaces 4294967295    
35 Percentile value 50    

wdir_cdf-50p

octet(s) content value meaning notes
1-4 length of section in octets 35    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 6 Percentile forecasts at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 2 Momentum  
11 Parameter number 0 Wind Direction (from which blowing) : WDIR  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 103 Specified Height Level Above Ground : m  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 10    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Percentile value 50    

wgust

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 2 Momentum  
11 Parameter number 22 Wind Speed (Gust) : m s-1 : GUST  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 103 Specified Height Level Above Ground : m  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 10    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

gust_cdf-50p

octet(s) content value meaning notes
1-4 length of section in octets 35    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 6 Percentile forecasts at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 2 Momentum  
11 Parameter number 22 Wind Speed (Gust) : m s-1 : GUST  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 103 Specified Height Level Above Ground : m  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 10    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Percentile value 50    

wspd

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 2 Momentum  
11 Parameter number 1 Wind Speed : m s-1 : WIND  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 103 Specified Height Level Above Ground : m  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 10    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

tropical_blend

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 2 Momentum  
11 Parameter number 232 NotFound  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 103 Specified Height Level Above Ground : m  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 10    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

wspd10_cdf-50p

octet(s) content value meaning notes
1-4 length of section in octets 35    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 6 Percentile forecasts at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 2 Momentum  
11 Parameter number 1 Wind Speed : m s-1 : WIND  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Forecast generating process identified 104 National Blend GRIB  
15-16 Hours after reference time data cutoff 65535    
17 Minutes after reference time data cutoff 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 103 Specified Height Level Above Ground : m  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 10    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    
35 Percentile value 50    

wspd30

octet(s) content value meaning notes
1-4 length of section in octets 34    
5 section number 4    
6-7 Number of coordinate values after template 0 no vertical discretization has occured for this data  
8-9 product template 0 Analysis or forecast at a horizontal level or in a horizontal layer at a point in time  
10 Parameter category 2 Momentum  
11 Parameter number 1 Wind Speed : m s-1 : WIND  
12 Type of generating process 2 Forecast  
13 Background generating process identifier 255    
14 Analysis or forecast generating process identified 104 National Blend GRIB  
15-16 Hours of observational data cutoff after reference time 65535    
17 Minutes of observational data cutoff after reference time 255    
18 Indicator of unit of time range 1 Hour  
19-22 Forecast time in units defined by octet 18 varies    
23 Type of first fixed surface 103 Specified Height Level Above Ground : m  
24 Scale factor of first fixed surface 0    
25-28 Scaled value of first fixed surface 30    
29 Type of second fixed surfaced 255 Missing  
30 Scale factor of second fixed surface 0    
31-34 Scaled value of second fixed surfaces 0    

 

IS5: Data Representation Section

Standard (all except tstm03 / tstm06)

octet(s) content value meaning notes
1-4 length of section in octets 49    
5 section number 5    
6-9 "Number of data points where one or more values are specified in Section 7 when a bit map is present; total number of data points when a bit map is absent" varies by grid (see IS3)   3744965 (co); 1822145(ak); 76275(pr); 350625(hi); 4573389(oc)
10-11 template number 3 Grid Point Data - Complex Packing and Spatial Differencing  
12-15 Reference value (R) (IEEE 32-bit floating-point value) varies    
16-17 Binary scale factor (E) varies   usually stable by element: vis=7; cig/cldbse/snowlevel=3;
appt/dewp/mxwbalft/temp/wgust/wspd=2;
negengy/pop12/posengy/ppi/prfzrn/probiceprsnt/probrefzslt/
prrain/prsleet/prsnow/qpf01/qpf06/rh/sky/slrblend/wdir=0
18-19 Decimal scale factor (D) varies   usually stable by element; usually 0 or 1; qpf01/qpf06=3; wdir=4294967295
20 Number of bits used for each packed value for simple packing, or for each group reference value for complex packing or spatial differencing varies    
21 Type of original field values 0 Floating Point  
22 Group splitting method used 1 General Group Splitting  
23 Missing value management used 1 Primary missing values included within the data values  
24-27 Primary missing value substitute 9999    
28-31 Secondary missing value substitute 0    
32-35 NG ― number of groups of data values into which field is split varies    
36 Reference for group widths varies   usually 0 - 1
37 Number of bits used for the group widths (value after - oct 5.36) varies    
38-41 Reference for group lengths 1   may vary; probrefzslt has value 2147483647
42 Length increment for the group lengths 1   may vary
43-46 True length of last group varies    
47 Number of bits used for the scaled group lengths (after - oct5.38 and % by oct5.42) varies    
48 Order of spatial difference 2 Second-Order Spatial Differencing  
49 Number of octets required in the data section to specify extra descriptors needed for spatial differencing (octets 6-ww in data template 7.3) varies   usually 1-2

tstm03 / tstm06

octet(s) content value meaning notes
1-4 length of section in octets 21    
5 section number 5    
6-9 "Number of data points where one or more values are specified in Section 7 when a bit map is present; total number of data points when a bit map is absent" 1943462 (tstm03); 3744965 (tstm06)    tstm03 dooes not match other conus products; tstm06 matches other conus products
10-11 template number 0 Grid Point Data - Complex Packing and Spatial Differencing  
12-15 Reference value (R) (IEEE 32-bit floating-point value) varies    
16-17 Binary scale factor (E) 0   may vary
18-19 Decimal scale factor (D) 0   may vary
20 Number of bits used for each packed value for simple packing, or for each group reference value for complex packing or spatial differencing varies    
21 Type of original field values 0 Floating Point  

 

IS6: Bit Map Section

Standard (all except tstm03 / tstm06)

octet(s) content value meaning notes
1-4 length of section in octets 6    
5 section number 6    
6 bitmap indicator 255 A bit map does not apply to this product  

tstm03 / tstm06

octet(s) content value meaning notes
1-4 length of section in octets 6    
5 section number 6    
6 bitmap indicator 0 A bit map applies to this product and is specified in this section  
7+   0   All values = 0 

 

IS7: Data Section

Standard (all except tstm03 / tstm06)

octet(s) content value meaning notes
1-4 length of section in octets varies    
5 section number 7    
6+ data 0   in a format described by data Template 7.X, where X is the data representation template number in octet 5.10

tstm03 / tstm06

octet(s) content value meaning notes
1-4 length of section in octets varies    
5 section number 7    
6+ data 0   in a format described by data Template 7.X, where X is the data representation template number in octet 5.10

 

IS8: End Section

All

octet(s) content value meaning notes
1-4   7777 [END]

Coded according to the International Alphabet Number 5.

NBM