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20041213: Using NAGRIB on grid #221

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  • Subject: 20041213: Using NAGRIB on grid #221
  • Date: Tue, 14 Dec 2004 09:48:54 -0700
Luis,

Apparently one of the GRIB products you have is using
a table 131. Using the GBDIAG parameter for PDS would show
you which parameter numbers are beingused for the table 131.

The NWS site that provides the NWS local table definitions does
not show any updates past table 130:
http://www.nco.ncep.noaa.gov/pmb/docs/on388/table2.html

However I do find that NCDC references table 131 for reanalysis
data rather than the current tables 2, 3, 129 and 130 that we see
for realtime data::
http://www.ncdc.noaa.gov/oa/documentlibrary/pdf/tddoc/td6175.pdf

If you file is reanalysis data, then that document will direct you to
the parameter definitions that you would need to create the 131 version 
tables for your data set::
ftp://wesley.ncep.noaa.gov/pub/wgrib/nceptab_131
I tried that ftp site this morning and didn't get connected, so you'd
have to verify that information yourself.


Steve Chiswell
Unidata User SUpport



>From: address@hidden
>Organization: UCAR/Unidata
>Keywords: 200412140143.iBE1helI006495

>Steve,
>I am trying to use the gempak program "nagrib" to convert gridded
>data from a GRIB into a GEMPAK file. Since the input file is in 
>the AWIPS grid #221, I set  CPYFIL   = #221. However, I find 
>some problems like the following:
>
>GEMPAK-NAGRIB> GEMPAK-NAGRIB> Changing center table to cntrgrib1.tbl
> Changing vertical coord table to vcrdgrib1.tbl
> Changing WMO parameter table to wmogrib131.tbl
> [NA -1]  The table wmogrib131.tbl cannot be opened.
> [NA -1]  The table wmogrib131.tbl cannot be opened.
>
>         1 GRIB messages were read or scanned from the GRIB file:
>     20030913_1200_hght_500.grib
>
>         0 grids were written to the GEMPAK file:
>     20030913_1200_hght_500.gem
>
> Parameters requested: GBFILE,INDXFL,GDOUTF,PROJ,GRDAREA,KXKY,MAXGRD,CPYFIL,
> GAREA,OUTPUT,GBTBLS,GBDIAG,PDSEXT.
>
>I do not see "wmogrib131.tbl" in the directory $GEMTLB/grid and this makes me
>think that something is not right with the definition of the grid parameters. 
>Are you able to provide some assistance to successfully convert this file?
>
>Thanks, Luis M Farfan.
>
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