-gribtable_used¶

Introduction¶

The grib variable table that is built in to wgrib2 is based on the NCEP table and entries from other centers. For the WMO-defined entries, NCEP names are used. You may want to change the grib table because

grib table is incomplete
you want to use names that make sense
the center's names for locally defined fields are not included in wgrib2
you want to use an unofficial table

To solve this problem, you can set up user grib tables.

https://www.cpc.ncep.noaa.gov/products/wesley/wgrib2/user_grib2tables.html

Now the -gribtable_used option helps you set up the user grib table. The option writes grib table entries used by a file.

Usage¶

-gribtable_used OUTPUT
     OUTPUT is a file with the grib table entries for each field

Example¶

$ wgrib2 gep19.t00z.pgrb2af180 -gribtable\_used junk
1:0:d=2009060500:HGT:200 mb:180 hour fcst:ENS=+19
2:46042:d=2009060500:TMP:200 mb:180 hour fcst:ENS=+19
3:63079:d=2009060500:RH:200 mb:180 hour fcst:ENS=+19
..

$ sort -u junk > grbtbl     (get rid of duplicate entries)
edit grbtbl, change UGRD to U, VGRD to V and TMP to T

$ export grib2table=`pwd`/grbtbl      (define a user grib table)

$ wgrib2 gep19.t00z.pgrb2af180 -match '(U|V|T)'
1:0:d=2009060500:HGT:200 mb:180 hour fcst:ENS=+19
2:46042:d=2009060500:T:200 mb:180 hour fcst:ENS=+19
3:63079:d=2009060500:RH:200 mb:180 hour fcst:ENS=+19
4.1:86046:d=2009060500:U:200 mb:180 hour fcst:ENS=+19
4.2:86046:d=2009060500:V:200 mb:180 hour fcst:ENS=+19
5:137483:d=2009060500:HGT:250 mb:180 hour fcst:ENS=+19
6:184669:d=2009060500:T:250 mb:180 hour fcst:ENS=+19
..

Note: U and V will not be treated as vectors in -new_grid.  You have
to use -new_grid_vectors to get U and V to be vectors.

Description: out X write out sample gribtable as derived from grib file, X=file

Docs derived from https://www.cpc.ncep.noaa.gov/products/wesley/wgrib2/gribtable_used.html