[Met_help] [Fwd: [Wrf-users] Error in Validating WRF-ARW with MET]

Wed Feb 24 10:44:08 MST 2010

Joe,

OK.  So it sounds like there's something else going on here.  Please do send a couple of files to work on that demonstrate the problem.  You can FTP them to our anonymous ftp site as follows:

ftp ftp.rap.ucar.edu
username = anonymous
password = "your email address"
cd incoming/irap/met_help/eastman_data
put "your files"
bye

So please send us...
- Sample WRFOUT file that demonstrate the problem
- The "wrf_cntrl.parm" file you're using
- The script you're using to run WPP
- The output from WPP showing the error message you're seeing

Thanks,
John

Joe Eastman wrote:
> Hi John,
> 
> My netCDF files are single frame. I would send a couple but they are 320Mb a piece. This is not just for a single integration. I have tested this on multiple integrations and WPP converts the wrf output at t=0 just fine but WPP bombs on any subsequent files/times.  
> 
> Take care,
> Joe
> 
> Dr. Joseph L. Eastman
> Senior Atmospheric Scientist 
> WindLogics Inc.
> 201 4th St NW
> Grand Rapids, MN
> 55744
> 
> c - 410.279.9702
> w - 651.556.4297
> jeastman at windlogics.com
> 
> 
> 
> -----Original Message-----
> From: John Halley Gotway [mailto:johnhg at rap.ucar.edu] 
> Sent: Tuesday, February 23, 2010 5:21 PM
> To: Joe Eastman
> Cc: ridwan.java at gmail.com; met_help
> Subject: RE: [Met_help] [Fwd: [Wrf-users] Error in Validating WRF-ARW with MET]
> 
> Joe,
> 
> Sorry for the delay.  Actually, I got your support question confused with
> a different one we had received recently.  It's essentially the same
> question, and I thought we'd already sent you the answer!
> 
> I asked the primary WPP support person here, and she told me that since
> you're running ARW, you most likely have multiple output times in each
> WRFOUT NetCDF file.  That's fine, but you'll need to use a slightly
> different script for running WPP.
> 
> Try using the "WPPV3.1/scripts/run_wrfpost_frames" script.  That will read
> multiple times from the ARW NetCDF files and write them out to separate
> GRIB output files - one file per output time.
> 
> Please give that a shot and let us know if you encounter any more problems.
> 
> Thanks,
> John
> 
>> Hello
>>
>> The problem I am currently having is that the WPP is only working on WRF's
>> initial output at t=0. For all subsequent writes it chokes in a subroutine
>> that is calculating radar ref for non-Ferrier scheme. The help on the WPP
>> end is slow at the moment, I believe the person handling this might be
>> gone. Does the wrf output need to be in a single file or is multiple files
>> fine?
>>
>> Take care,
>> Joe
>>
>> Dr. Joseph L. Eastman
>> Senior Atmospheric Scientist
>> WindLogics Inc.
>> 201 4th St NW
>> Grand Rapids, MN
>> 55744
>>
>> c - 410.279.9702
>> w - 651.556.4297
>> jeastman at windlogics.com
>>
>>
>>
>> -----Original Message-----
>> From: met_help-bounces at mailman.ucar.edu
>> [mailto:met_help-bounces at mailman.ucar.edu] On Behalf Of John Halley Gotway
>> Sent: Tuesday, February 23, 2010 12:56 PM
>> To: ridwan.java at gmail.com; met_help
>> Subject: Re: [Met_help] [Fwd: [Wrf-users] Error in Validating WRF-ARW with
>> MET]
>>
>> Hello,
>>
>> You recently sent a support question to "wrfhelp at ucar.edu" regarding the
>> use of the MET verification tool.  The wrfhelp support staff forwarded it
>> to us here in met_help.  In the future, feel free to
>> send MET support questions directly to "met_help at ucar.edu".
>>
>> It appears that you're trying to use the NetCDF output of WRF directly in
>> MET.  Unfortunately, there's an additional step required before MET can
>> read the WRF output.  You must first run your WRFOUT
>> files through the WRF Post-Processor (WPP).  You can find information
>> about installing/running WPP here:
>>
>> WRF-NMM Download Site:
>> http://www.dtcenter.org/wrf-nmm/users/downloads/index.php
>> WRF-NMM Users Guide:
>> http://www.dtcenter.org/wrf-nmm/users/docs/user_guide/V3/users_guide_nmm_chap1-7.pdf
>>
>> WPP is posted on the NMM site, but it may run on either WRF-NMM or WRF-ARW
>> output.  WPP prepares your model output for verification in 3 main ways:
>> (1) Interpolates the data horizontally from a staggered model grid to a
>> more standard regularly spaced grid.
>> (2) Interpolates vertically from model levels to pressure levels.
>> (3) Derives several output fields.
>>
>> WPP writes it's output in GRIB format, and MET is set up to read that GRIB
>> output of WPP.  For the upcoming release of MET, we are working to add
>> support for the NetCDF output of the "pinterp" tool -
>> a post-processing tool which works only on ARW output.  However, we have
>> no plans to support WRF model output directly so as not to duplicate the
>> functionality already available in WPP.
>>
>> Hope that helps clarify the issue.  For more details, please refer to:
>> MET Website:         http://www.dtcenter.org/met/users
>> MET Users Guide:
>> http://www.dtcenter.org/met/users/docs/users_guide/MET_Users_Guide_v2.0_rev2.pdf
>> MET online tutorial:
>> http://www.dtcenter.org/met/users/support/online_tutorial/METv2.0/index.php
>>
>> Also, before responding to any more support questions, we will need you to
>> fill out the free registration form on the MET downloads page:
>> http://www.dtcenter.org/met/users/downloads/index.php
>>
>> Just enter your email address in the box and hit enter to be taken to the
>> registration form.
>>
>> Thanks,
>> John Halley Gotway
>> johnhg at ucar.edu
>>
>>
>> jwolff at ucar.edu wrote:
>>> This came to wrf-users at ucar.edu...
>>> Though maybe you would want to respond as met_help.
>>>
>>>
>>> ---------------------------- Original Message
>>> ----------------------------
>>> Subject: [Wrf-users] Error in Validating WRF-ARW with MET
>>> From:    "Ridwan" <ridwan.java at gmail.com>
>>> Date:    Thu, February 18, 2010 8:16 pm
>>> To:      wrf-users at ucar.edu
>>> --------------------------------------------------------------------------
>>>
>>> Dear WRF-users,
>>>
>>> I want to validate WRF-ARW output with Model Evaluation Tool (MET), but
>>> when
>>> I combine the .nc file in em_real directory, it always shows the
>>> following
>>> error:
>>>
>>> [faisal at localhost METv2.0]$ bin/pcp_combine -sum 00000000_000000 3
>>> 20100215_210000 24 tutorial/out/pcp_combine/test.nc -pcpdir
>>> data/sample_obs/metPerforming sum command:
>>> init_time/in_accum/valid_time/out_accum Times = 0/10800/1266267600/86400
>>> Searching for 8 files with accumulation times of 3 hours to sum to a
>>> total
>>> accumulation time of 24 hours in data/sample_obs/met
>>>
>>>   *GribFile::skip_header() -> can't find "GRIB" magic cookie
>>>
>>> ***WARNING*** check_file_time() -> can't open precipitation grib file:
>>> data/sample_obs/met/met_em.d01.20100215_030000.nc
>>>
>>>
>>>   GribFile::skip_header() -> can't find "GRIB" magic cookie
>>>
>>> ***WARNING*** check_file_time() -> can't open precipitation grib file:
>>> data/sample_obs/met/met_em.d01.20100215_090000.nc
>>> **
>>> *Can anyone help me?
>>>
>>> Thank you.
>>>
>>>
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> 