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10/February/2025

(UPDATED 7/March/2025) Planned changes to operational forecast systems

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  • April 2025: DWD's contribution will be upgraded to a new forecast system version (GCFS2.2)
  • May 2025
    • BoM's ACCESS-S2 forecast system will be incorporated into the C3S seasonal forecast activity
    • Météo-France's contribution will be upgraded to a new forecast system version (System9)

The documentation for these forecast systems has been now published in the corresponding Knowledge Base pages (following the links in the previous paragraph)

Please note that at least on the 10th of the month prior to those release dates, the documentation for these forecaast systems will be published in the corresponding Knowledge Base page and the initial set of hindcast (re-forecast) data will be released in the C3S seasonal forecast datasets on the Climate Data Store.


Decisions on Météo-France System9 and CMCC SPS4 forecast systems system are still pending. Details will be communicated as soon as they are available.

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