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What's wrong?

An error has been detected affecting the following data :

• Snowfall amount from CMCC-CM2-v20160423 (CMCC SPSv3) data
  
  • Affects all data from monthly and daily CDS catalogue entries
    • Start dates:
      
      • all November start dates both for hindcasts from 1993 to 2016 and 2018 real-time forecast
      • all December start dates for hindcasts from 1993 to 2016
  • It also affects monthly anomalies CDS catalogue entry
    • Start dates: 2018-11-01

This error has been caused by a bug in one of CMCC's postprocessing tools, and its outcome was to produce values equal to zero of daily snowfall amount in places where the snowfall was below a given threshold.

in the climate data store (CDS):

• Dataset: ERA5 hourly data on pressure levels from 2000 to present
  
  • Parameters: U-component of wind, V-component of wind
  • Affected period: 1/1/2000 - 31/12/2008 and 1/6/2018 - present

This problem was caused by the computation of U/V from grid-point Vo/D, but it should be done from Vo/D in spherical harmonics representation.

What do I do if I downloaded the wrong data?

Because this This error has not been fixed yet, this means that :

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any data corresponding to the description above which have been retrieved so far is wrong, and will continue to be wrong until a fix is in place

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. You should not use this data and wait until the problem is fixed.

When will the issue be fixed?

It is estimated the problem will be fixed before the end of November. Exact details of when the problem is fixed will be provided in the page.

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CDS retrievals
(forms and API)

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WebAPI retrievals

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