[Met_help] [Fwd: MET point-stat]

John Halley Gotway johnhg at ucar.edu
Tue Mar 2 12:35:35 MST 2010


Your question about the MET Point-Stat tool was forwarded to us here at met_help at ucar.edu.  Please send future MET-related questions directly to "met_help at ucar.edu".
And any questions you have about WRF or the WRF Post-Processor should be sent to "wrfhelp at ucar.edu".

OK, there's two ways we can go with this...

(1) First, I took a look at the GRIB file you sent.  When you run it through the "wgrib" tool, you'll see the following output:

wgrib COPS_T2M_1989-01-15.grb

It looks like this file contains 8 records of temperature.  However, the level value for all of these records is set to 0.  For 2-meter temperature, the level should be set to a value of 2.  My guess
is that these should really be levels like 2-meters, 1000mb, 800mb, and so on.  In your configuration file, I tried changing "TMP/Z2" to "TMP/Z0" and MET was able read the data.  However, you really
should fix how the level value is being written in the GRIB file.

(2) Second, there is a new beta version of the WRF PostProcessor that DOES support the ARW rotated lat-long grid.  We're currently in the testing phase with these changes.  And we'd like to find users
to try the code out.  I've attached this WPP beta version to this message.  If you're willing to test it out for us, we'd appreciate it.  You can send any questions or comments that come up directly
to wrfhelp at ucar.edu.

Hope that helps,
John Halley Gotway
met_help at ucar.edu

wrfhelp wrote:
> John,
> Would you please help take a look at this email? Thanks!
> Ming
> ------------------------------------------------------------------------
> Subject:
> MET point-stat
> From:
> Jianting Chu <Jianting.Chu at uni-hohenheim.de>
> Date:
> Sun, 28 Feb 2010 18:04:41 +0100
> To:
> wrfhelp <wrfhelp at ucar.edu>
> To:
> wrfhelp <wrfhelp at ucar.edu>
> Dear Sir,
>    I have some trouble with point-stat of METv2.0. Would you please
> giving me some advices?
>    Because I use rotated lat-lon projection, I can not use WPP to get
> GRIB files from wrfout*.nc. In stead, I transfer wrfout*.nc to CF.nc
> with NCL firstly, then, transfer it to GRIB file with CDO.
>    Please check the attenched file for my GRIB file and PointStatConfig.
> However, it always said that:
> ----------------------------------------------------
> ERROR: process_grib_codes() -> no records matching GRIB code 11 with
> level indicator of Z2 found in GRIB file: COPS_T2M_1989-12-30.grb
> ----------------------------------------------------
>    I have changed the variable name from T_2m to var11.
>    Are there some special name or rule for GRIB files to METool? Would
> you please provide a sample GRIB file from WPP?
>    Thank you very much in advance.
> Best regards,
> Jianting
> ------------------------------------------------------------------------
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> Met_help mailing list
> Met_help at mailman.ucar.edu
> http://mailman.ucar.edu/mailman/listinfo/met_help
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