What is NBM?

The National Blend of Models (NBM) is a nationally consistent and skillful suite of calibrated forecast guidance based on a blend of both NWS and non-NWS numerical weather prediction model data and post-processed model guidance. The goal of the NBM is to create a highly accurate, skillful and consistent starting point for the gridded forecast. This new way to produce NDFD grids will be helpful providing forecasters with a suite of information to use for their forecasts. The NBM is considered an important part of the efforts to evolve NWS capabilities to achieve a Weather-Ready Nation.

NBM Model Inputs

NBM MODEL INPUTS: These are the model inputs and sources for the NBM v4.1. Model names with an * are new to NBM v4.1
Model Name Agency Resolution Cycles/Day Members Cycles Updated
ACCESS-G BoM Australia 12 km 2x 1 07, 19
ACCESS-GE * BoM Australia 35 km 4x 18 02, 08, 14, 20
EC MOSD ECMWF N/A (Stations only) 2x 1 08, 20
EC MOSE ECMWF N/A (Stations only) 2x 50 09, 21
ECMWFD ECMWF 25 km 2x 1 08, 20
ECMWFE ECMWF 50 km 2x 50 09, 21
GDPS CMC Canada 25 km 2x 1 05, 17
GEPS CMC Canada 50 km 2x 20 07, 19
GEFS NCEP 25 km 4x 30 01, 07, 13, 19
GFS NCEP 13 km 4x 1 05, 11, 17, 23
GFS MOS STN NCEP N/A (Stations only) 4x 1 00, 06, 12, 18
GLMP NCEP 2.5 km 24x 1 Every hour
GMOS NCEP 2.5 km 2x 1 07, 19
HiResW ARW NCEP 3 km 2x 1 04, 16
HiResW ARW MEM2 NCEP 3 km 2x 1 04, 16
HiResW FV3 NCEP 3 km 2x 1 04, 16
HMON NCEP 1.5 km 4x 1 00, 06, 12, 18
HREF NCEP 5 km 2x 8 07, 19
HRRR NCEP 3 km 24x 1 Every hour
HRRR-EXT NCEP 3 km 4x 1 03, 09, 15, 21
HWRF NCEP 1.5 km 4x 1 00, 06, 12, 18
LAMPMOS NCEP N/A (Stations only) 24x 1 Every hour
MELD NCEP 2.5 km 24x 1 Every hour
MMEBC NCEP/WPC 5 km 4x 1 00, 06, 12, 18
NAM NCEP 12 km 4x 1 03, 09, 15, 21
NAMMOS NCEP N/A (Stations only) 4x 1 03, 09, 15, 21
NAMNest NCEP 3 km 4x 1 03, 09, 15, 21
NAVGEMD FNMOC 50 km 4x 1 00, 06, 12, 18
NAVGEME FNMOC 50 km 2x 20 06, 18
RAP NCEP 13 km 24x 1 Every hour
RAP-EXT NCEP 13 km 4x 1 00, 06, 12, 18
RDPS CMC Canada 10 km 4x 1 04, 10, 16, 22
REPS CMC Canada 15 km 2x 20 07, 19
RTMA NCEP 2.5 km 24x 1 every hour
QMD MDL 2.5 km 4x 1 01, 07, 13, 19
SREF NCEP 16 km 4x 24 01, 07, 13, 19
REWPS * CMC Canada 2.5 km 2x 20 05, 17
GEPS Waves CMC Canada 25 km 2x 20 07, 19
NAVGEMD Waves FNMOC 100 km 2x 1 07, 19
NAVGEME Waves FNMOC 50 km 2x 20 07, 19
GFS WW3D Waves NCEP 25 km 4x 1 05, 11, 17, 23
GEFS WW3E Waves NCEP 25 km 4x 30 01, 07, 13, 19
WW3D HIRES Waves NCEP 9-17 km 4x 1 05, 11, 17, 23
GLWU Waves NCEP 2.5 km 4x 1 02, 08, 14, 20

 

 

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For further information about the National Blend of Models, please contact the NBM Web Team.