[Met_help] [rt.rap.ucar.edu #69403] History for MET with ECMWF GRIB files

[John Halley Gotway via RT]

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  Initial Request
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Hello,

I would like to verify ECMWF GRIB-1 files, but the problem is that the
GRIB-table of ECMWF is different from NCEP. I have found this one-year-old
ticket on the web:

http://mailman.ucar.edu/pipermail/met_help/2013-October/002024.html

I just wanted to ask whether there is a solution since then to use ECMWF
GRIB files with MET. I am currently using METv4.1 , but I am ready to
install a newer version is this is necessary to solve my problem.

Thanks a lot in advance,
Balazs Szintai

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  Complete Ticket History
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Subject: MET with ECMWF GRIB files
From: John Halley Gotway
Time: Thu Oct 16 14:17:52 2014

Balazs,

met-5.0 does not include support for the ECMWF usage of GRIB.  In
previous versions of MET, the GRIB tables were harded-coded, but the
code is now reading them from a flat-file at runtime.  That flat file
can be found here:
   METv4.1/data/table_files/nceptab_flat.txt

And in met-5.0, it's reading it from the installed met-5.0 directory
"share/met/table_files/nceptab_flat.txt".

The difference really is just in the GRIB code abbreviations and
units.  I would expect that MET can read ECMWF GRIB1 files, but that
it just uses the wrong names for the variables.  Is that the behavior
you're seeing?

If you'd like to change MET's behavior, you could edit that flat file
to use whichever abbreviations and units you'd like.  The next time
you run the MET tools, it'll just read in the updated strings and use
them.

I agree that it would be preferable to more full support ECMWF GRIB
data without putting this onus on the user, but we don't currently get
any ECMWF data.  So it's difficult to support.

Hope that helps.

On Thu Oct 16 10:30:46 2014, johnhg wrote:
> Hello,
>
> I would like to verify ECMWF GRIB-1 files, but the problem is that
the
> GRIB-table of ECMWF is different from NCEP. I have found this one-
year-old
> ticket on the web:
>
> http://mailman.ucar.edu/pipermail/met_help/2013-October/002024.html
>
> I just wanted to ask whether there is a solution since then to use
ECMWF
> GRIB files with MET. I am currently using METv4.1 , but I am ready
to
> install a newer version is this is necessary to solve my problem.
>
> Thanks a lot in advance,
> Balazs Szintai


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