dataset · Global

NOAA Global Ensemble Forecast System (GEFS) Re-forecast

NOAA has generated a multi-decadal reanalysis and reforecast data set to accompany the next-generation version of its ensemble prediction system, the Global Ensemble Forecast System, version 12 (GEFSv12). Accompanying the real-time forecasts are “reforecasts” of the weather, that is, retrospective forecasts spanning the period 2000-2019. These reforecasts are not as numerous as the real-time data; they were generated only once per day, from 00 UTC initial conditions, and only 5 members were prov

Source details

Licence: NOAA data disseminated through NODD are open to the public and can be used as desired. <br/> <br/> NOAA makes data openly available to ensure maximum use of our data, and to spur and encourage explora

Evidence quality: 27

Listed in aws-odr public catalogue API on 2026-10-16; relevance/value screened (haiku).

Metadata checked: 2026-10-14T13:20:00.000Z

Evidence

• arn:aws:s3:::noaa-gefs-retrospective
• https://registry.opendata.aws/noaa-gefs-reforecast/

Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.