G2TBLS

     G2TBLS allows for specification of the GRIB2 decoding tables.
     The format is G2TBLS=W;N;V;L:C, where W is the WMO decoding table
     for standard parameters, N is the decoding table for local
     parameters defined by the opriginating center, V is the vertical 
     coordinate table for WMO defined levels, L is the vertical coordinate
     table for local levels defined by the originating center, and C is 
     the originating center table.
     The defaults are 
	$GEMTBL/grid/g2varswmoX.tbl, 
	$GEMTBL/grid/g2varsYYYYZ.tbl,
	$GEMTBL/grid/g2vcrdwmoX.tbl,
	$GEMTBL/grid/g2vcrdYYYYZ.tbl,
	$GEMTBL/grid/wmocenter.tbl,
     where X is the master table version number in the GRIB message, 
     Z is the local table version number,
     and YYYY is the lower case abbreviation of the originating center in 
     wmocenter.tbl.