NOAA Global Ensemble Forecast System (GEFS) Re-forecast

Description

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 provided, with the following exception. Once weekly, an 11-member reforecast was generated, and these extend in lead time to +35 days. Browse the bucket at https://noaa-gefs-retrospective.s3.amazonaws.com/index.html.

Update Frequency

Re-forecasts do not adhere to an update frequency.

License

Open Data. There are no restrictions on the use of this data.

Documentation

https://noaa-gefs-retrospective.s3.amazonaws.com/Description_of_reforecast_data.pdf

Managed By

See all datasets managed by NOAA.

Contact

For any data delivery issues or any questions in general, please contact the NOAA Big Data Program Team at: noaa.bdp@noaa.gov.

Usage Examples

Tutorials

• Example using GEFS Reforecast Data from AWS by Victor Gensini
  
• Retrospective Dissertation - Part 3: Reforecast Data by Francisco Alvarez
  

Publications

• The GEFS v12 and its reanalyses and reforecasts (Slides) by Tom Hamill