Re: warning when using GFS analysis data

Hi Agnes,

In general you should know that the major centers such as NCEP and
ECMWF add new parameters to their tables on a regular basis. It is
not possible for us to keep our tables completely up-to-date if we
want to get any other work done. However, if you want, you can use
your own text-based tables that you can update yourself. You can
start with text-based tables that are downloadable from our web-site.
You can find them by going to:
http://www.ncl.ucar.edu/Document/Manuals/Ref_Manual/
NclFormatSupport.shtml#GRIB1-built-in-parameter-tables

Click on any of the built-in tables and you will find a link to a
downloadable text-based version that you can use if you set
NCL_GRIB_PTABLE_PATH appropriately (Also read the next section
entitled "User-defined GRIB1 parameter tables").

However, in this particular case parameter number 255 means "missing"
and likewise table version 255 also means a missing table. So I would
suspect that this GRIB record and the NCL variable VAR_255 should
just be ignored.
  -dave

On Apr 17, 2009, at 3:00 PM, Agnes Lim Huei Ni wrote:

> Hi
>
> I just notice that when i run plots for gfs analysis data, the
> following
> warning appear on screen
> warning:NclGRIB: Unknown grib parameter number detected (255,
> center 7,
> table version 255 grib record 218), using default variable name
> (VAR_255)
>
> How do i fix that?
>
> Agnes
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Received on Fri Apr 17 2009 - 15:58:05 MDT