Dear Colleague,

As part of its efforts to produce the best possible analysis, ECMWF continuously reacts to changes in the observing system. Actions are taken to blacklist suspected observations and to allow the use of trusted and tested datasets. Records are kept for of all the events that affected the observing system used at ECMWF. Such information might be of interest to ECMWF's forecast users and to the wide NWP community. The list of the main data events is now made available to ECMWF forecast users at:

https://confluence.ecmwf.int/display/FCST/Observations+data+events

The list is updated manually on a regular and best effort basis.

If you have any questions about this new resource information, please do not hesitate to contact servicedesk@ecmwf.int

Best regards

Prof. Florian Pappenberger
Director of Forecasts

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