[gradsusr] Unable To Open Concatanated Regional GEM GRIB2s With GrADS

[Andrew Revering]

I'm not sure if this is true or even related, but I thought regional GEMs
were in a polar stereographic projection, and if that's true would that
make any difference? I use 25km global GEMs without a problem,

-- side note/thread hijacking...is there any way to convert polar
stereographic to latlon projection?

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On Tue, Mar 25, 2014 at 3:11 PM, Perry, Aaron @ LSC <Aaron.Perry at lsc.vsc.edu
> wrote:

>  I should also mention that I was displaying the UGRD10m with 'd
> UGRD10m.1' to make sure that GrADS was looking at the correct control file.
> After fixing this, from UGRD10m.2 to UGRD10m.1, I'm now getting the Request
> is completely outside file limits/cannot contour grid error.
>
>
>
> Onward and Upward,
>
> Aaron D. Perry
> Atmospheric Sciences
> Lyndon State College
> Class of 2016
> Boston, MA
> Twitter: @AaronPerryLSC <https://twitter.com/AaronPerryLSC>
> Mobile: 617-780-4312
>       ------------------------------
> *From:* gradsusr-bounces at gradsusr.org [gradsusr-bounces at gradsusr.org] on
> behalf of Perry, Aaron @ LSC [Aaron.Perry at lsc.vsc.edu]
> *Sent:* Tuesday, March 25, 2014 4:05 PM
> *To:* gradsusr at gradsusr.org
> *Subject:* Re: [gradsusr] Unable To Open Concatanated Regional GEM GRIB2s
> With GrADS
>
>   Greg,
>
> I still got the data request warning error when taking the ABSV variable
> out of the big GRIB2 file so, I tried just downloading UGRD10m and VGRD10m
> separately and NOT cat'ing them together and then running g2ctl/gribmap on
> each and now I getting a separate "Data Request Error: File number out of
> range" warning for both UGRD10m and VGRD10m when I try to open them
> separately in GrADS.
>
> Here's the grid descriptor file text: http://paste2.org/LgGwD89f
>
> (scratches head)
>
>
>
> Onward and Upward,
>
> Aaron D. Perry
> Atmospheric Sciences
> Lyndon State College
> Class of 2016
> Boston, MA
> Twitter: @AaronPerryLSC <https://twitter.com/AaronPerryLSC>
> Mobile: 617-780-4312
>       ------------------------------
> *From:* Perry, Aaron @ LSC
> *Sent:* Tuesday, March 25, 2014 1:57 PM
> *To:* GrADS Users Forum
> *Subject:* RE: [gradsusr] Unable To Open Concatanated Regional GEM GRIB2s
> With GrADS
>
>   Hi Greg,
>
> I'm going to try leaving out ABSV and then cat the rest of the GRIB2s like
> I usually do and see what that does.
>
> Thanks again for all the help!
>
> I'll let you know how it goes...
>
>
>
> Onward and Upward,
>
> Aaron D. Perry
> Atmospheric Sciences
> Lyndon State College
> Class of 2016
> Boston, MA
> Twitter: @AaronPerryLSC <https://twitter.com/AaronPerryLSC>
> Mobile: 617-780-4312
>       ------------------------------
> *From:* gradsusr-bounces at gradsusr.org [gradsusr-bounces at gradsusr.org] on
> behalf of Greg West [gwest at eos.ubc.ca]
> *Sent:* Tuesday, March 25, 2014 1:15 PM
> *To:* gradsusr at gradsusr.org
> *Subject:* Re: [gradsusr] Unable To Open Concatanated Regional GEM GRIB2s
> With GrADS
>
>   Aaron,
>
>  From your script it looks like you're grabbing the 15km GEM. The 15km
> used to give me the same problem though. If you run g2ctl.pl on the
> concatenated grib2 file, it will give you one grid description. The problem
> is that I believe that's just based on the first field it encounters, and
> there might be another field in the concatenated file that's on a different
> grid. I think I download all of those fields except ABSV, and since that's
> a derived field, I would suspect it might be the one on a different grid. I
> would recommend downloading your usual files, but leaving them in their
> separate grib2 files (1 field per file). Then pick a forecast time and run
> each file through g2ctl.pl and see what grid description it gives you.
> The ctl file generated for the ABSV file might be different from the others.
>
>  If ABSV is the problem field, an alternative to making a separate ctl
> file just for that field would be to not download it, and instead calculate
> it from the u and v winds.
>
>  Greg
>
> ____________________________
> Greg West, PhD
> Postdoctoral Fellow
> Weather Forecast Research Team
> University of British Columbia
> EOS-Main 224
> GWest at eos.ubc.ca
> --
> Meteorologist
> Hydrology & Technical Services
> BC Hydro
> Greg.West at bchydro.com
>
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> Message: 3
> Date: Mon, 24 Mar 2014 22:49:45 +0000
> From: "Perry, Aaron @ LSC" <Aaron.Perry at lsc.vsc.edu>
> Subject: Re: [gradsusr] Unable To Open Concatanated Regional GEM
>         GRIB2s  With    GrADS
> To: GrADS Users Forum <gradsusr at gradsusr.org>
> Message-ID:
>         <
> DEE427CC71C1184E9F7C903BF1EEE7A80B65D4BC at LSC-EX10MBX03.lsc.vsc.edu>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi Greg,
>
> Thank you very much for chiming in! I've been using the usual
> http://dd.weatheroffice.gc.ca/model_gem_regional/10km/grib2/ datasource to
> pull the GRIB2s and then run them through g2ctl/gribmap.
>
> Truly stumped right now...
>
>
>
> Onward and Upward,
>
> Aaron D. Perry
> Atmospheric Sciences
> Lyndon State College
> Class of 2016
> Boston, MA
> Twitter: @AaronPerryLSC<https://twitter.com/AaronPerryLSC>
> Mobile: 617-780-4312
>
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>
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