return to catalog
Dataset: 2025/202508/gdas1.fnl0p25.2025083118.f00.grib2
Catalog: d083003 Aggregation-2025
dataFormatGRIB-2
authorityedu.ucar.rda
featureTypeGRID
dataSize468278378
idaggregations/g/d083003/1/d083003-2025/files/2025/202508/gdas1.fnl0p25.2025083118.f00.grib2
Access
Preview

Access:

ServiceTypeDescription
HTTPServer Data Access HTTP file download.

Viewers:

ViewerTypeDescription
default_viewer.ipynb Jupyter Notebook The TDS default viewer attempts to plot any Variable contained in the Dataset.
Documentation
Keywords
Dates
Creators
Publishers
Geospatial Coverage
Time Coverage
Properties

Description:

  • Rights: Freely Available
  • summary: 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.
  • summary: 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.
  • summary: The archive time series is continuously extended to a near-current date. It is not maintained in real-time.
  • NCEP GDAS/FNL 0.25 Degree Global Tropospheric Analyses and Forecast Gridss (d083003)
  • NCEP Model documentation

Keywords:

  • : Numerical Weather Prediction
  • : NCEP
  • : Model data
  • : GFS

Dates:

  • modified : 2025-09-01T21:42:55.344Z

Creators:

Publishers:

GeospatialCoverage:

  • Longitude: 0.0 to 359.75 Resolution=0.25 degrees_east
  • Latitude: -90.0 to 90.0 Resolution=0.25 degrees_north

TimeCoverage:

  • Start: 2025-01-01T00:00:00Z
  • End: 2025-11-02T03:00:00Z
  • Duration: 10.024 months

Properties:

  • Originating_or_generating_Center = US National Weather Service, National Centres for Environmental Prediction (NCEP)
  • Originating_or_generating_Subcenter = 0
  • GRIB_table_version = 2,1
  • Type_of_generating_process = Forecast
  • Analysis_or_forecast_generating_process_identifier_defined_by_originating_centre = Analysis from GFS (Global Forecast System)
  • file_format = GRIB-2
  • Conventions = CF-1.6
  • history = Read using CDM IOSP GribCollection v3
  • featureType = GRID
return to catalog