These NCEP FNL (Final) operational global analysis and forecast data are on 0.25-degree by 0.25-degree grids prepared operationally every six hours. This product is from the Global Data Assimilation System (GDAS), which continuously collects observational data from the Global Telecommunications System (GTS), and other sources, for many analyses.

The Global Forecast System (GFS) is a National Centers for Environmental Prediction (NCEP) weather forecast model that generates data for dozens of atmospheric and land-soil variables, including temperatures, winds, precipitation, soil moisture, and atmospheric ozone concentration. The system couples four separate models (atmosphere, ocean model, land/soil model, and sea ice) that work together to accurately depict weather conditions.

• Data Resourse: https://www.nco.ncep.noaa.gov/pmb/products/gfs/

• NCEP GDAS/FNL 0.25 Degree Global Tropospheric Analyses and Forecast Grids -- analysis

93 parameters from NCEP GRIB2 : https://rda.ucar.edu/datasets/ds083.3/#metadata/grib2.html?_do=y
30 WMO_GRIB2 levels : https://rda.ucar.edu/datasets/ds083.3/#metadata/grib2_levels.html?_do=y

• NCEP GFS 0.25 Degree Global Forecast Grids Historical Archive -- forecasting

Summary for Grids in WMO_GRIB2 Format: https://rda.ucar.edu/datasets/ds084.1/index.html#metadata/detailed.html?_do=y
Inventory of File gfs.t00z.pgrb2.0p25.f003: https://www.nco.ncep.noaa.gov/pmb/products/gfs/gfs.t00z.pgrb2.0p25.f003.shtml