This free dataset, obtained via the Unidata Internet Data Distribution System (IDD), contains 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. Model specific information can be found in the ds335.0 documentation page.

The most current month of model output is available online through the ds335.0 data page. Online archives are populated daily with model output generated two days prior to the current date. Older historical files, beginning in December 2002, are available upon request. Higher resolution versions of RUC, NAM, and higher resolution global GFS and GFS Ensemble are available starting November 1, 2006. All model output files are stored in their native GRIB1 and GRIB2 formats.

More information is available.