Problems decoding GRIB2 GFS Ensemble grids

[Kevin R. Tyle]

Hi Steve,

Thanks for the updated files.  I can now get it to work using the
GEMPAK5.9.3 version of dcgrib2 using the corrected tables.  However, even
with the updated tables, versions 5.9.1 and 5.7.4 of dcgrib2 still do not
decode.  Perhaps I shall just recompile dcgrib2 for use in these two
distributions (which are still in operational use here) unless you have
another idea.

Thanks,

Kevin

______________________________________________________________________
Kevin Tyle, Systems Administrator               **********************
Dept. of Earth & Atmospheric Sciences           ktyle at atmos.albany.edu
University at Albany, ES-235                    518-442-4578 (voice)
1400 Washington Avenue                          518-442-5825 (fax)
Albany, NY 12222                                **********************
______________________________________________________________________

On Mon, 9 Oct 2006, Steve Chiswell wrote:

> Kevin,
>
> The GEMPAK GRIB2 parameter tables use 4 numbers to define the parameter
> name.
> The 4th column is the parameter template, which allows different names
> to be assigned depending on the type ofaccumulation, average, ensemble
> etc. used.
> Log messages from dcgrib2 under "decode_grib2 -34" about unknown
> parameter
> mean that the decoder tables need to be updated (in particular, entries
> for ensemble PDTs 1 and 11 in column 4).
>
> Updated g2varswmo2.tbl and g2varsncep1.tbl tables which include the
> ensemble entries can be downloaded from:
>
> http://www.unidata.ucar.edu/downloads/gempak/tables/
>
> Steve Chiswell
> Unidata User SUpport
>
>
>
>
> On Mon, 2006-10-09 at 21:26 +0000, Kevin R. Tyle wrote:
> > I've been attempting to decode the GFS ensemble data from the "new"
> > CONDUIT NCEP ftp directory, as described in
> > http://www.unidata.ucar.edu/data/conduit/ldm_idd/ensemble_files.html#GRIB2.
> > However, dcgrib2 is not able to determine the GEMPAK parameter name, and
> > no GEMPAK grid is created.  I've attached the output from the dcgrib2 log.
> >
> > Command line used:  dcgrib2 -v 4 -d dcgrib.log YYMMHHDD_gefs_@@@.gem <
> > gec00.t12z.pgrb2af48
> >
> > Any ideas?
> >
> > Thanks,
> >
> > Kevin
> >
> > ______________________________________________________________________
> > Kevin Tyle, Systems Administrator               **********************
> > Dept. of Earth & Atmospheric Sciences           ktyle at atmos.albany.edu
> > University at Albany, ES-235                    518-442-4578 (voice)
> > 1400 Washington Avenue                          518-442-5825 (fax)
> > Albany, NY 12222                                **********************
> > ______________________________________________________________________
> --
> Steve Chiswell <chiz at unidata.ucar.edu>
> Unidata
>