Some known problems

IFS output is constantly monitored for bias or inconsistency between forecast and observed values and a list of inconsistencies is maintained and dynamically updated with a view to rectification of the problems.  Users also can play a part by identifying and reporting when certain weather parameters are being poorly forecast.  Focus should be on issues that occur repeatedly, rather than on one-off failures.  Notifications can be made by email to servicedesk@ecmwf.int (please use subject "Feedback on forecast performance").  Once it has been corroborated, an issue may be added to ECMWF's "official list" for attention and ultimate removal of the problem in a future release (Cycle) of the IFS models.  Keep up-to-date with known IFS forecasting issues.  It should be noted that those issues that have been marked as resolved (indicated by grey text in the link) will still be relevant when inspecting historical data.

Below are a few items.

Atmospheric model problems related to:

  Ocean Model Problems:

Additional Information

(Note: In older material there may be references to issues that have subsequently been addressed)