[Met_help] MET Version 1.1

[John Halley Gotway]

Kevin,

Sorry for the delay in getting back to you.  I was out of the office last Friday.

Fortunately, I think I can help on this issue.  The links listed below can also be found in the configuration file for the Point-Stat tool (METv1.1/data/config/PointStatConfig_default).

Regarding GRIB codes and units, the GRIB codes we're referring to are defined in the GRIB version 1 documentation:
http://www.nco.ncep.noaa.gov/pmb/docs/on388/

Table 2 defines the codes and corresponding units:
http://www.nco.ncep.noaa.gov/pmb/docs/on388/table2.html

For example, in this table, you'll find that temperature is defined as GRIB code 11 and should be in Kelvin.  Accumulated precip is GRIB code 61 and should be in millimeters.

As for Message_Type, you can refer to the following table:
http://www.emc.ncep.noaa.gov/mmb/data_processing/prepbufr.doc/table_1.htm

The most commonly used ones are ADPUPA and ADPSFC for upper air and surface observations, respectively.

One thing to note though is how Point-Stat matches observations to forecasts at the surface.  Currently, it does so only using the message type.  And only those observations with message type ADPSFC
or SFCSHP will be matched to surface forecasts.  In this context, 2-meter temperature and 10-meter winds are considered "surface" forecasts.  So for example, a forecast of 2-m temperature will only be
matched to observations that have a message type of ADPSFC or SFCSHP.

Hope that helps.  Feel free to write with more questions.

Thanks,
John Halley-Gotway
johnhg at ucar.edu


Kevin W. Thomas wrote:
> Hi...
> 
> I'm looking over the documentation on the MET software, and I've come up with
> an issue that I have questions on.
> 
> The problem that I'm looking at is converting obs into the netCDF format that
> "pb2nc" and "ascii2nc" do.  The PrepBufr format is out, as I'm running this
> on a 64-bit machine, and I don't want to play the many games to get it to
> work.
> 
> I *do* have ascii decoded obs in our own internal format.  I could convert the
> file to the "ascii2nc" format, however the documentation page
> 
> http://www.dtcenter.org/met/users/support/online_tutorial/ascii2nc/index.php
> 
> references:
> 
> 1.  Message_Type
> 7.  Grib_Code corresponding to this observation type
> 10. Observation_Value in the units prescribed for the grid code.
> 
> I've not found anything in the documentation defining what these are, so I
> can't write any conversion code until I do.
> 
> Any help would be greatly appreciated.
> 
> 	Kevin W. Thomas
> 	Center for Analysis and Prediction of Storms
> 	University of Oklahoma
> 	Norman, Oklahoma
> 	Email:  kwthomas at ou.edu
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