[ncarg-talk] ncarg-talk Digest, Vol 123, Issue 5
Sébastien POITEVIN
sebastien.poitevin at meteoconsult.com
Fri Jan 12 03:58:37 MST 2018
Thanks for your help Mary.
Indeed, we dont have the same problem with GFS grib files for example.
Sent grib file has been produced by WRF-NMM (version V3.7.1) and UPPV3.0.
2018-01-11 18:58 GMT+01:00 <ncarg-talk-request at ucar.edu>:
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> 1. Re: [6.4.0 version] Bug : Categorical Snow always null
> (Mary Haley)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 11 Jan 2018 11:58:28 -0600
> From: Mary Haley <haley at ucar.edu>
> To: S?bastien POITEVIN <sebastien.poitevin at meteoconsult.com>
> Cc: Ncl-talk <ncl-talk at ucar.edu>, ncarg-talk <ncarg-talk at ucar.edu>
> Subject: Re: [ncarg-talk] [6.4.0 version] Bug : Categorical Snow
> always null
> Message-ID:
> <CACNN_CLdCKu4bVbMeOHdxFsWzW+dJ7zK2HpWAKpsthQt2cSsVQ at mail.
> gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> S?bastien,
>
> We downloaded some similar files from:
>
> https://nomads.ncdc.noaa.gov/data/meso-eta-hi/
>
> and didn't see any issues with them, using both older and current versions
> of NCL.
>
> Can you tell us what the source of this file is? I'm wondering if it's
> possibly a "non-standard" GRIB file (I realize there are no GRIB standards
> really, but some files do violate particular rules).
>
> --Mary
>
>
> On Thu, Jan 11, 2018 at 9:51 AM, Mary Haley <haley at ucar.edu> wrote:
>
> > Hi S?bastien,
> >
> > Sorry I didn't respond sooner. I was at a conference.
> >
> > Thanks for providing a small file that clearly shows the problem.
> >
> > I have submitted a ticket on this, NCL-2712, and put a high priority on
> it.
> >
> > You are correct that it appears to be setting all the 1s to 0s. This is
> > very puzzling. I will see if we can look at this soon.
> >
> > --Mary
> >
> >
> >
> > On Tue, Jan 9, 2018 at 4:24 AM, S?bastien POITEVIN <sebastien.poitevin@
> > meteoconsult.com> wrote:
> >
> >> Dear Mary,
> >>
> >> Thanks for your help.
> >>
> >> Find in attached, WRF-NMM grib file and, below, asked informations :
> >>
> >>
> >>
> >> 1. No error return with ncl_filedump
> >> 2.
> >>
> >>
> >> *printVarSummary(csnow) : Variable: csnowType: floatTotal Size: 1443112
> >> bytes 360778 valuesNumber of Dimensions: 2Dimensions and
> sizes:
> >> [g0_lat_0 | 529] x [g0_lon_1 | 682]Coordinates: g0_lat_0:
> >> [53.012..39.787] g0_lon_1: [-6.01..11.722]Number Of
> Attributes:
> >> 12 center : US National Weather Service - NCEP (WMC)
> long_name :
> >> Categorical snow units : yes=1;no=0 _FillValue : 1e+20
> >> level_indicator : 1 gds_grid_type : 0
> parameter_table_version
> >> : 2 parameter_number : 143 model : North Pacific
> Hurricane
> >> Wave Model forecast_time : 18 forecast_time_units : hours
> >> initial_time : 01/08/2018 (18:00) *
> >> 3.
> >> *printMinMax(csnow,0) *
> >> (0) Categorical snow: min=0 max=0
> >>
> >> 4.
> >>
> >>
> >> *print(num(ismissing(csnow))) (0) 61086 *
> >>
> >>
> >> 2018-01-08 17:16 GMT+01:00 Mary Haley <haley at ucar.edu>:
> >>
> >>> ?Dear Sebastien,
> >>>
> >>> In the future please post NCL questions / issues to ncl-talk at ucar.edu.
> >>> The ncarg-talk at ucar.edu email list is for NCAR Graphics users, and is
> >>> not an active group.
> >>>
> >>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
> >>>
> >>> ?Without having access to the dataset, it is hard for us to debug this
> >>> problem. It would help, then, if you could provide more information
> about
> >>> the variable, like what kind of metadata it has.
> >>>
> >>> Do you get any kind of error from ncl_filedump?
> >>>
> >>> Could you run the short NCL script below, and send me the output from
> >>> running it, using both NCL V6.3.0 and V6.4.0, including any error
> messages:
> >>>
> >>> a = addfile("20122017_15.grb","r")
> >>> csnow = a->CSNOW_GDS0_SFC
> >>> printVarSummary(csnow)
> >>> printMinMax(csnow,0)
> >>> print(num(ismissing(csnow)))
> >>>
> >>> Finally, is there some place we can download this file, or a similar
> >>> one, from?
> >>>
> >>> Thanks,
> >>>
> >>> --Mary
> >>>
> >>> On Wed, Jan 3, 2018 at 1:49 AM, S?bastien POITEVIN <
> >>> sebastien.poitevin at meteoconsult.com> wrote:
> >>>
> >>>> Hi all,
> >>>>
> >>>> When we read "Categorical Snow" with NCL 6.4.0 version (ncl_filedump
> -v
> >>>> CSNOW_GDS0_SFC 20122017_15.grb or with 'PrintMinMax' command), we have
> >>>> always null value (min and max value = 0) whereas we have no problem
> when
> >>>> we read the same grib file with the 6.3.0 version (min = 0 and max =
> 1).
> >>>>
> >>>> Grib files are produced by WRF-NMM (version V3.7.1) and UPPV3.0.
> >>>>
> >>>> Our system is "3.16.0-4-amd64 #1 SMP Debian 3.16.43-2+deb8u5
> >>>> (2017-09-19) x86_64 GNU/Linux"
> >>>>
> >>>> Unfortunately I cannot send you a WRF grib file because it is too
> large.
> >>>>
> >>>> Thanks for your help.
> >>>>
> >>>> --
> >>>>
> >>>> _______________________________________________
> >>>> ncarg-talk mailing list
> >>>> ncarg-talk at ucar.edu
> >>>> http://mailman.ucar.edu/mailman/listinfo/ncarg-talk
> >>>>
> >>>>
> >>>
> >>
> >>
> >> --
> >>
> >
> >
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