Potential WMO adoption April21

[marqh]

Potential Local Codes for WMo

• [x] wet bulb potential temperature
  • http://reference.metoffice.gov.uk/grib/grib2/mo--74/4.2/0-0-192
• [x] cloud water mixing ratio
  • http://reference.metoffice.gov.uk/grib/grib2/mo--74/4.2/0-1-192
• [x] surface adjusted wind
  • http://reference.metoffice.gov.uk/grib/grib2/mo--74/4.2/0-2-192
  • http://reference.metoffice.gov.uk/grib/grib2/mo--74/4.2/0-2-193
  • http://reference.metoffice.gov.uk/grib/grib2/mo--74/4.2/0-2-194
  • http://reference.metoffice.gov.uk/grib/grib2/mo--74/4.2/0-2-195
• [x] upward UV
  • http://reference.metoffice.gov.uk/grib/grib2/mo--74/4.2/0-4-192
• [ ] scattered cloud
  • http://reference.metoffice.gov.uk/grib/grib2/mo--74/4.2/0-6-192
• [x] convective cloud level
  • http://reference.metoffice.gov.uk/grib/grib2/mo--74/4.5/193
  • http://reference.metoffice.gov.uk/grib/grib2/mo--74/4.5/194

[marqh]

On scattered cloud

this is listed in the local table as

• height of lowest cloud base greater than 2.5 oktas (kft) http://reference.metoffice.gov.uk/grib/grib2/mo--74/4.2/0-6-192

WMO tables list cloud heights in units of metres http://codes.wmo.int/grib2/codeflag/4.2/0-6-11

as GRIB is unit locked and prefers SI units, so a cloud level in kft may be difficult to progress

this is different again from an alternative proposal cloud amount below 1000 feet above surface level (%) shared in a doc from @mgange659

I wonder if we are not in a strong position to pursue scattered cloud with WMO given http://reference.metoffice.gov.uk/grib/grib2/mo--74/4.2/0-6-192

[marqh]

Issues raised for ticked entries

https://github.com/wmo-im/GRIB2/issues