GRIB-API definition

NameWind directionAbbreviationwdirUnitdegree trueparamId:3031

 

UERRA details

DefinitionWind direction on a height level.
Validityinstantaneous
Comment 


WMO GRIB2 definition

Parameter
Discipline0meteorological products
Parameter category2momentum
Parameter number0
wind direction (from which blowing)
Level
Type of first fixed surface103specified height level above ground (m)
Scale factor of first fixed surface0 
Scaled value of first fixed surfacevalue in m 
Type of second fixed surfaceall bits to 1missing
Scale factor of second fixed surfaceall bits to 1missing
Scaled value of second fixed surfaceall bits to 1missing

5 Comments

  1. Richard Mladek

    Oct 23, 2015

    In GRIB-API there exists only "Mean wind direction" (paramId 140242) but without WMO definition. Could we reuse this definition with WMO added?

    update: NO as it is for wave model

  2. Richard Mladek

    Oct 23, 2015

    Add WMO definition to the already existing paramId 3031

  3. Sebastien Villaume

    May 11, 2016

    " wdir" seems fine at first as shortName

    however, "w" is also the vertical wind component (u,v,w are the three components). Even if "w wind component direction" does not make sense, it could confuse some users. Well, I don' t know, I' m not the expert.

  4. Sebastien Villaume

    May 11, 2016

    anyway, it is already in use so we can not change it, lets proceed.

     

    Shahram Najm: should I open a JIRA issue for this separately?

  5. Shahram Najm

    May 11, 2016

    If any decision is made (and I mean really made with the approval of the Gods of DGOV!), then please raise a JIRA issue