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Historical Unidata Internet Data Distribution (IDD) Gridded Model Data, December 2002 - current

Historical Unidata Internet Data Distribution (IDD) Gridded Model Data are obtained via the Unidata Internet Data Distribution System (IDD). Data includes gridded analyses and forecasts from US National Centers for Environmetal Prediction (NCEP) and European Centre for Medium-Range Weather Forecasts (ECMWF) models. Models include NCEP ETA/NAM and RUC covering the Continental US, NCEP Ensemble and GFS covering North America and the globe, and GFS Extended and ECMWF covering the globe, at various spatial and temporal resolutions. Potential variables found in the model output include pressure, relative humidity, temperature, geopotential height, U-component wind speed, and V-component wind speed.

Online archives include 1 month of data, and are populated daily with model output generated two days prior to the current date. Additionally, GFS Global 0.5 degree analysis fields from Nov 2006 to near the present are available online for http download. Older historical files, beginning in December 2002, are available upon request. Software to extract and download user specified parameters is available through the "DS Software" tab.

More information is available.

PERIODS:

2002-12-01 00:00 +0000 to 2009-12-18 18:00 +0000 (Entire dataset)

Period details by subset

Period details by subset:
2002-12-01 00:00 +0000 to 2009-06-11 00:00 +0000 (NCEP Regional Ensemble files)
2002-12-01 12:00 +0000 to 2009-06-13 00:00 +0000 (ECMWF Global files)
2002-12-04 12:00 +0000 to 2007-02-10 00:00 +0000 (GFS Global Extended files)
2002-12-01 00:00 +0000 to 2007-02-05 18:00 +0000 (GFS Northern Hemisphere files)
2002-12-01 00:00 +0000 to 2007-02-03 00:00 +0000 (ETA/NAM 80km CONUS files)
2002-12-01 00:00 +0000 to 2007-02-01 09:00 +0000 (RUC 80km CONUS files)
2006-11-01 00:00 +0000 to 2009-11-17 21:00 +0000 (RUC2 20km CONUS files)
2006-11-01 00:00 +0000 to 2009-11-20 06:00 +0000 (NAM 12km CONUS files)
2006-11-01 00:00 +0000 to 2009-12-06 06:00 +0000 (GFS 0.5deg Global files)
2006-11-01 00:00 +0000 to 2009-12-01 18:00 +0000 (GFS 1.0deg Global files)
2006-11-08 12:00 +0000 to 2009-12-18 18:00 +0000 (GFS 2.5deg Global files)
2006-11-01 00:00 +0000 to 2009-10-16 06:00 +0000 (GFS 1.0deg Global Ensemble files)

UPDATES:

Daily (nominally)

VARIABLES:

Air Temperature	Geopotential Height	Humidity	Precipitation Amount
Sea Level Pressure	Surface Pressure	Surface Winds	Upper Level Winds

GRIB parameter table

LEVELS:

See the detailed metadata for level information

TYPES:

Grid

COVERAGE:

Longitude Range: Westernmost=180W Easternmost=180E
Latitude Range: Southernmost=90S Northernmost=90N

Detailed coverage information

Detailed coverage information:
2.5° x 2.5°, 90E to 180E and 0N to 90N (37 x 37 Longitude/Latitude) (ECMWF Global files)
2.5° x 2.5°, 180E to 270E and 35N to 35S (37 x 29 Longitude/Latitude) (ECMWF Global files)
2.5° x 2.5°, 90W to 0E and 0N to 90S (37 x 37 Longitude/Latitude) (ECMWF Global files)
2.5° x 2.5°, 180E to 90W and 0N to 90N (37 x 37 Longitude/Latitude) (ECMWF Global files)
2.5° x 2.5°, 90E to 180E and 0N to 90S (37 x 37 Longitude/Latitude) (ECMWF Global files)
2.5° x 2.5°, 0E to 90E and 0N to 90N (37 x 37 Longitude/Latitude) (ECMWF Global files)
2.5° x 2.5°, 180E to 270E and 0N to 90S (37 x 37 Longitude/Latitude) (ECMWF Global files)
2.5° x 2.5°, 90W to 0E and 35N to 35S (37 x 29 Longitude/Latitude) (ECMWF Global files)
2.5° x 2.5°, 90E to 180E and 35N to 35S (37 x 29 Longitude/Latitude) (ECMWF Global files)
2.5° x 2.5°, 90W to 0E and 0N to 90N (37 x 37 Longitude/Latitude) (ECMWF Global files)
2.5° x 2.5°, 0E to 90E and 0N to 90S (37 x 37 Longitude/Latitude) (ECMWF Global files)
2.5° x 2.5°, 0E to 90E and 35N to 35S (37 x 29 Longitude/Latitude) (ECMWF Global files)
2.5° x 2.5°, 180E to 270E and 0N to 90N (37 x 37 Longitude/Latitude) (ECMWF Global files)
81.271km x 81.271km (at 25N) oriented 95W (93x65 Lambert Conformal starting at 12.19N,133.459W) (ETA/NAM 80km CONUS files)
0.5° x 0.5°, 0E to 359.5E and 90N to 90S (720 x 361 Longitude/Latitude) (GFS 0.5deg Global files)
2.5° x 2.5°, 0E to 357.5E and 90N to 90S (144 x 73 Longitude/Latitude) (GFS 0.5deg Global files)
1° x 1°, 0E to 359E and 90N to 90S (360 x 181 Longitude/Latitude) (GFS 0.5deg Global files)
1.429° x 1.25°, 240E to 330E and 0N to 90N (reduced Longitude/Latitude) (GFS 0.5deg Global files)
1° x 1°, 0E to 359E and 90N to 90S (360 x 181 Longitude/Latitude) (GFS 1.0deg Global Ensemble files)
40.635km x 40.635km (at 25N) oriented 265E (151x113 Lambert Conformal starting at 16.281N,233.862E) (GFS 1.0deg Global Ensemble files)
2.5° x 2.5°, 0E to 357.5E and 90N to 90S (144 x 73 Longitude/Latitude) (GFS 1.0deg Global Ensemble files)
1° x 1°, 0E to 359E and 90N to 90S (360 x 181 Longitude/Latitude) (GFS 1.0deg Global files)
2.5° x 2.5°, 0E to 357.5E and 90N to 90S (144 x 73 Longitude/Latitude) (GFS 2.5deg Global files)
5° x 5°, 0E to 355E and 90S to 0N (72 x 19 Longitude/Latitude) (GFS Global Extended files)
5° x 5°, 0E to 355E and 0N to 90N (72 x 19 Longitude/Latitude) (GFS Global Extended files)
381km x 381km (at 60N) oriented 105W (65x65 North Polar Stereographic) (GFS Northern Hemisphere files)
190.5km x 190.5km (at 60N) oriented 105W (65x43 North Polar Stereographic) (GFS Northern Hemisphere files)
190.5km x 190.5km (at 60N) oriented 150W (45x39 North Polar Stereographic) (GFS Northern Hemisphere files)
190.5km x 190.5km (at 60N) oriented 60W (45x39 North Polar Stereographic) (GFS Northern Hemisphere files)
12.191km x 12.191km (at 25N) oriented 265E (614x428 Lambert Conformal starting at 12.19N,226.541E) (NAM 12km CONUS files)
1.765° x 1.25°, 150E to 120W and 0N to 90N (reduced Longitude/Latitude) (NCEP Regional Ensemble files)
1.765° x 1.25°, 120W to 30W and 0N to 90N (reduced Longitude/Latitude) (NCEP Regional Ensemble files)
1.765° x 1.25°, 60E to 150E and 0N to 90N (reduced Longitude/Latitude) (NCEP Regional Ensemble files)
1.765° x 1.25°, 150E to 240E and 0N to 90N (reduced Longitude/Latitude) (NCEP Regional Ensemble files)
81.271km x 81.271km (at 25N) oriented 95W (93x65 Lambert Conformal starting at 12.19N,133.459W) (RUC 80km CONUS files)
20.318km x 20.318km (at 25N) oriented 265E (301x225 Lambert Conformal starting at 16.281N,233.862E) (RUC2 20km CONUS files)
40.635km x 40.635km (at 25N) oriented 265E (151x113 Lambert Conformal starting at 16.281N,233.862E) (RUC2 20km CONUS files)
32.463km x 32.463km (at 50N) oriented 253E (59x47 Lambert Conformal starting at 47.043N,228.832E) (RUC2 20km CONUS files)

SOURCES:

UCAR/UNIDATA

Unidata, University Corporation for Atmospheric Research

DOC/NOAA/NWS/NCEP

National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce

ECMWF

European Centre for Medium-Range Weather Forecasts

PUBLICATIONS:

Recommended acknowledgement for this dataset:
"The data for this study are from the Research Data Archive (RDA) which is maintained by the Computational and Information Systems Laboratory (CISL) at the National Center for Atmospheric Research (NCAR). NCAR is sponsored by the National Science Foundation (NSF). The original data are available from the RDA (http://dss.ucar.edu) in dataset number ds335.0."

VOLUME:

32820.09 GBytes (Entire dataset)

Volume details by subset

Volume details by subset:
NCEP Regional Ensemble files: 346.18 GBytes
ECMWF Global files: 8.84 GBytes
GFS Global Extended files: 284.47 MBytes
GFS Northern Hemisphere files: 20.30 GBytes
ETA/NAM 80km CONUS files: 32.60 GBytes
RUC 80km CONUS files: 79.09 GBytes
RUC2 20km CONUS files: 3083.67 GBytes
NAM 12km CONUS files: 2103.46 GBytes
GFS 0.5deg Global files: 12255.73 GBytes
GFS 1.0deg Global files: 5242.13 GBytes
GFS 2.5deg Global files: 280.24 GBytes
GFS 1.0deg Global Ensemble files: 9367.56 GBytes

DATA FORMATS:

WMO GRIB1, WMO GRIB2

RELATED DATASETS:

ds330.0 - Historical THORPEX Interactive Grand Global Ensemble (TIGGE) Data Archive
ds330.2 - Near-Realtime Online THORPEX Interactive Grand Global Ensemble (TIGGE) Data
ds336.0 - Historical Unidata Internet Data Distribution (IDD) Global Observational Data, May 2003 - current
ds608.0 - NCEP North American Regional Reanalysis (NARR)
ds609.2 - GCIP NCEP Eta model output
ds625.0 - Japanese 25-year Reanalysis Project
ds627.0 - ERA-Interim Project

MORE DETAILS:

View more details for this dataset, including dataset citation, data contributors, and other detailed metadata

CONTACT:

For assistance with this dataset, please contact Doug Schuster (303-497-1216) . If the specialist is unavailable, please contact Data Help.

DATA ACCESS:

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