[gradsusr] Reading timesteps in Arpège grib2 file

[Brian Gaze]

Wesley,

You can ftp down the grib file here using anonymous:

137.135.248.188

ARPEGE_0.1_SP1_37H48H_201512150000.grib2

PS: It's about 40 meg and I tested the ftp download successfully from a command
line rather than gui client

Cheers

Brian


> On 16 December 2015 at 15:03 Wesley Ebisuzaki - NOAA Federal
> <wesley.ebisuzaki at noaa.gov> wrote:
> 
>     Brian,
> 
>     It would be much easier if you made your grib file available
>     by FTP. If the file is huge or is a proprietary forecast, you can
>     zero out the data by
> 
>     wgrib2 file.grib -rpn 0 -grib_out file00.grb
> 
>     Wesley
> 
> 
> 
>     On Tue, Dec 15, 2015 at 4:32 PM, Brian Gaze < brian.gaze at ntlworld.com
> <mailto:brian.gaze at ntlworld.com> > wrote:
> 
>         > > 
> >         Hi,
> > 
> >         I'm working with Arpège grib2 files. These should I think each
> > contain up to 13 hourly forecast timesteps. If I run...<http://g2ctl.pl>
> > 
> >         -verf -b file.grib2 > file.ctl
> >         gribmap -i file.ctl
> > 
> >         ...I'm able to open the .ctl file in GrADS but it only has 2
> > timesteps. T1 seems to be the time the model was initialized and T2 the time
> > of the first forecast step.
> > 
> > 
> >         If I try:<http://g2ctl.pl>
> > 
> >         -b -ts1hr file.grib2 > file.ctl
> >         gribmap -i file.ctl
> > 
> >         It opens ok in GrADS and the correct number of timesteps are present
> > but they begin from the model initialization hour rather than incrementing
> > from the time of the first forecast step. For example:
> > 
> >         Model initialization: 0z 15/12
> >         Forecast time range contained in the file is +37 hours to +48 hours
> > after initialization
> > 
> >         t2 = 1z 15/12
> >         t3 = 2z 15/12
> >         .. etc
> > 
> >         As a consequence, when I try to plot a variable the grid is
> > undefined.
> > 
> > 
> >         What should I think be present is:
> >         t2 = 13z 16/12
> >         t3 = 14z 16/12
> >         ..etc
> > 
> >         Any suggestions / ideas on what I'm doing wrong?
> > 
> >         Thanks
> > 
> >         BWG
> > 
> > 
> >         _______________________________________________
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> >         gradsusr at gradsusr.org <mailto:gradsusr at gradsusr.org>
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> > 
> > 
> >     > 
> 


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