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.

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 questions regarding data delivery not associated with this platform or any general questions regarding the NOAA Big Data Program, email noaa.bdp@noaa.gov.
We also seek to identify case studies on how NOAA data is being used and will be featuring those stories in joint publications and in upcoming events. If you are interested in seeing your story highlighted, please share it with the NOAA BDP team here: 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