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

| DOI: 10.5065/D65Q4T4Z

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 FNLs are made with the same model which NCEP uses in the Global Forecast System (GFS), but the FNLs are prepared about an hour or so after the GFS is initialized. The FNLs are delayed so that more observational data can be used. The GFS is run earlier in support of time critical forecast needs, and uses the FNL from the previous 6 hour cycle as part of its initialization.

The analyses are available on the surface, at 26 mandatory (and other pressure) levels from 1000 millibars to 10 millibars, in the surface boundary layer and at some sigma layers, the tropopause and a few others. Parameters include surface pressure, sea level pressure, geopotential height, temperature, sea surface temperature, soil values, ice cover, relative humidity, u- and v- winds, vertical motion, vorticity and ozone.

The archive time series is continuously extended to a near-current date. It is not maintained in real-time.

Temporal Range:
2015-07-08 00:00 +0000 to 2024-07-24 21:00 +0000 (Entire dataset) Period details by dataset product
Air Temperature Albedo Cloud Frequency Cloud Liquid Water/Ice
Dew Point Temperature Evaporation Geopotential Height Gravity Wave
Heat Flux Humidity Hydrostatic Pressure Ice Extent
Land Use/Land Cover Classification Longwave Radiation Maximum/Minimum Temperature Planetary Boundary Layer Height
Potential Temperature Precipitation Amount Precipitation Rate Runoff
Sea Level Pressure Sea Surface Temperature Shortwave Radiation Skin Temperature
Snow Depth Snow Water Equivalent Soil Moisture/Water Content Soil Temperature
Surface Winds Total Precipitable Water Upper Air Temperature Upper Level Winds
Vertical Wind Velocity/Speed Vorticity Wind Shear
GRIB2 parameter table: HTML | XML
Vertical Levels:
See the detailed metadata for level information.
Data Types:
Spatial Coverage:
Longitude Range: Westernmost=180W Easternmost=180E
Latitude Range: Southernmost=90S Northernmost=90N Detailed coverage information
Data Contributors:
National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce
Total Volume:
17.95 TB
Data Formats:
Related RDA Datasets:
NCEP FNL Operational Model Global Tropospheric Analyses, July 1976 to April 1997
NCEP FNL Operational Model Global Tropospheric Analyses, April 1997 through June 2007
NCEP FNL Operational Model Global Tropospheric Analyses, continuing from July 1999
NCEP GFS 0.25 Degree Global Forecast Grids Historical Archive
NCEP GFS 0.25 Degree Global Forecast Auxiliary Grids Historical Archive
NCEP GDAS/FNL Global Surface Flux Grids
Historical Unidata Internet Data Distribution (IDD) Gridded Model Data
NCEP ADP Global Upper Air and Surface Weather Observations (PREPBUFR format)
NCEP ADP Global Upper Air Observational Weather Data, October 1999 - continuing
NCEP ADP ETA / NAM Upper Air Observation Subsets
NCEP ADP Global Surface Observational Weather Data, October 1999 - continuing
NCEP GDAS Satellite Data 2004-continuing
More Details:
View a more detailed summary of the data, including specific date ranges and locations by parameter
Metadata Record:
Data License:
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