NDFD Grid Data

Data Directory Structure

(sub)Directory Contents
SL.us008001/ Data root: for NWS Telecommunication Gateway Server (top directory)
ST.expr/ Status of data as experimental: NDFD data is being made operational in a transitional manner 
ST.opnl/ Status of data: operational 
DF.gr2/ WMO GRIB files: Edition two, also known as GRIB2
DC.ndfd/ Data category: National Digital Forecast Database
AR.aaaaaaaa Area of Data: aaaaaaaa could be: CONUS, 1 of 16 overlapping NDFD CONUS, the Virgin Islands; Northern Hemisphere; North Pacific Ocean
VP.###-### Valid Period: ### can be the following: 001-003 covers Days 1-3; 004-007 covers days 4-7; 008-450 covers days 8-450
ds.sssss FILE NAME = data subcategory containing abbreviated NDFD element names (sssss). The current file for each element will be kept until overwritten by a new file for the same element


Data Portals

Operational GRIB Data

HTTP https://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/
FTP ftp://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/

Experimental and Legacy GRIB Data

HTTP https://tgftp.nws.noaa.gov/SL.us008001/ST.expr/DF.gr2/DC.ndfd/
FTP ftp://tgftp.nws.noaa.gov/SL.us008001/ST.expr/DF.gr2/DC.ndfd/


Additional NDFD Resources