[ncarg-talk] [6.4.0 version] Bug : Categorical Snow always null

[Sébastien POITEVIN]

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, Sébastien POITEVIN <sebastien.poitevin@
> 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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