[gradsusr] gribmap error with WRF output

[Jeff Duda]

Chris,
I'm not familiar with using the WRF software package to directly take
output from the native eta levels to isobaric surfaces without using some
sort of post-processing. For the longest time I used either ARWpost (now
deprecated) or the Unified Post Processor (still supported) to interpolate
raw output to isobaric surfaces. Therefore, I cannot directly explain to
you why your error might be occurring. It might help if you showed us your
namelist, specifically the entries that control outputting in grib format.
Right off the bat, however, i suspect at least part of the problem is the
fact that you have only 7 levels of output, and you probably used more than
7 for your nz in your model run, so there could be a mismatch going on.

If we can't figure this out from the namelist, I would suggest asking
wrfhelp about it. If that doesn't pan out, I would try the UPP. If that
still doesn't work, I have some Fortran code that will write out control
files for your raw output.

Jeff Duda

On Thu, Jul 28, 2016 at 10:30 AM, Chris Steele <
Chris.Steele at weatherquest.co.uk> wrote:

> Hi everyone,
>
>
>
> I’m trying to display WRF data in grads but I’m hitting problems with the
> use of gribmap. The data are output directly by WRF in grib format, rather
> than through any netcdf conversion. Grib2ctl appears to work fine and gives
> no errors but one of my variables appears on the same line as another in
> the control file initially, so I have to move it.
>
>
>
> Whenever I try and run gribmap I receive the message “gribmap error: GRIB
> header not found in scanning between records try increasing the value of
> the –s argument” I have tried increasing the value of s but to no avail.
> The data can be read in fine with wgrib. Does anyone know how to fix this
> issue?
>
>
>
> My ctl file is shown below:
>
>
>
> dset ^plevs_12km_06z
>
> index ^plevs_12km_06z.idx
>
> undef 9.999E+20
>
> title plevs_12km_06z
>
> *  produced by grib2ctl v0.9.13
>
> * command line options: plevs_12km_06z
>
> dtype grib 0
>
> pdef 165 174 lccr 43.379000 -16.586000 1 1 60.000000 0.000000 0.000000
> 12000 12000
>
> xdef 165 linear -16.586000 0.150092100621267
>
> ydef 174 linear 43.379000 0.109090909090909
>
> tdef 1 linear 06Z28jul2016 1mo
>
> *  z has 7 levels, for prs
>
> zdef 7 levels
>
> 1000 950 900 850 700 500 300
>
> vars 10
>
> DPTprs 7 17,100,0 ** (profile)
>
> ELONsfc  0 177,1,0  ** surface
>
> HGTprs 7 7,100,0 ** (profile)
>
> MIXRprs 7 53,100,0 ** (profile)
>
> NLATsfc  0 176,1,0  ** surface
>
> PRESprs 7 1,100,0 ** (profile)
>
> RHprs 7 52,100,0 ** (profile)
>
> TMPprs 7 11,100,0 ** (profile)
>
> UGRDprs 7 33,100,0 ** (profile)
>
> VGRDprs 7 34,100,0 ** (profile)
>
> ENDVARS
>
>
>
> Regards
>
>
>
> Chris
>
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>
>


-- 
Jeff Duda
Post-doctoral research associate
University of Oklahoma School of Meteorology
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