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NOAA Global Ensemble Forecast System Re-forecast

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NOAA Global Ensemble Forecast System Re-forecast


NOAA Global Ensemble Forecast System (GEFS) Re-forecasts from 2000-2019

Product type


Update frequency



Oct 2, 2020

Delivery method


NOAA has generated a multi-decadal reanalysis and reforecast dataset to accompany the next-generation version of its ensemble prediction system, the Global Ensemble Forecast System, version 12 (GEFSv12). These retrospective forecasts span the period 2000-2019

These reforecasts were not as frequent as the real-time data and were only generated once per day, 00 UTC initial conditions, and only 5 members were provided, with the following exception: Once weekly, an 11-member reforecast was generated, and these extend in lead time to +35 days.


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