29/November/2019

• The recovery process for wrong snowfall data from CMCC contribution has been now finished. More details in known issues E3a, E3b, E3c and E3d ("fixed issues" section here)

7/November/2019

• The recovery process for the wrong snowfall data from CMCC contribution has started for the November start date hindcasts (i.e. 1993 to 2016). More details can be found in known issues E3.a ("not fixed errors" section here)

11/October/2019

• All the relevant documentation for the new forecasting systems to be released with October 2019 real-time forecasts (Météo-France System7 and NCEP CFSv2) is now available.
• Due to technical reasons, the publication of monthly mean data for NCEP has been delayed, but the full set of high-frequency data will be available as expected in the CDS. This has been recorded as known issue E4 (see details here in the "not fixed errors" section)
  
  • As a side effect, publication of updated MetOffice hindcasts for November nominal start date (system=14) is also delayed.
  • The current estimate is that all the above-mentioned delayed data would be made available on the week commencing on 4th November.

22/August/2019

• An upgrade to Météo-France contribution (change of operational forecasting system from System 6 to System 7) will be introduced from October 2019 nominal start date. Documentation for the new system here.
• A new data stream will be added to the C3S seasonal forecast multi-system in October 2019. This data comes from NCEP's Climate Forecast System version 2 (CFSv2). Documentation for this system here.

5/April/2019

• An upgrade to MetOffice contribution (change of forecasting system version to GloSea5-GC2-LI) has been introduced from May 2019 nominal start date.