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Info

1. Brief  description:

After the latest CNRM model change in October 2020, the CNRM grid is inverted, i.e. j-dimension scans positively (south to north) instead of negatively (north to south) as per the S2S requirement  Encoding#Gridandresolution

As the related GRIB 2 scanningMode changed from 0 to 64, such GRIB 2 encoding is correct in principle. Still it is not desirable for reasons of consistency with the previous encoding of CNRM data, and in addition may cause problems for users.

https://jira.ecmwf.int/servicedesk/customer/portal/4/SD-92894

2. Recommendation:

Users should be aware of this when processing CNRM data from the affected period.

NCEP (kwbc)

Missing steps 0 and 0-24 in realtime outputs
Info

Due to operational setup and archiving at NCEP, the following products are not available in the realtime forecasts:

  • Step 0 is not available for all surface  instantaneous fields, except for mean sea level pressure (msl)
  • Step 0-24 (day 1) is not available for all daily-mean fields except 2 metre dewpoint temperature, Total cloud cover and Convective Available Potential Energy (CAPE)

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