Re: Problem reading NCEP RTMA grib2 files

I've not looked in depth but a quick pass with ncl_filedump shows a
variable TMP_P0_L103_GLC0 (Temperature, K), and grid-related variables for
rotation, lat and lon. Nothing for analysis uncertainty that I could find.

gerry

On Wed, Mar 6, 2013 at 1:08 PM, David Brown <dbrown@ucar.edu> wrote:

> Hi Winston,
>
> I will look into this. Thanks for the report.
> -dave
>
> On Mar 6, 2013, at 11:07 AM, Winston Hao wrote:
>
> > Hi All,
> >
> > I try to plot NCEP Real-Time Mesoscale Analysis (RTMA) hourly
> > 2-m temperature field using ncl, but I could not read those grib2 files
> > properly. I have uploaded an example file called
> LTIA98_KWBR_201107010000
> > to ftp.cgd.ucar.edu:/incoming The same file can be downloaded directly
> > from NCDC RTMA archive via wget. The link is
> >
> http://nomads.ncdc.noaa.gov/data/ndgd/201107/20110701/LTIA98_KWBR_201107010000
> > The file size is about 8 megabytes.
> >
> > The file should have two records, one for the temperature analysis
> and the
> > other for the analysis uncertainty. Wgrib2 utility confirms that:
> >
> > 1:0:d=2011070100:TMP:2 m above ground:anl:
> > 2:4799894:d=2011070100:TMP:2 m above ground:anl:analysis/forecast error
> >
> > However, in my ncl script, or from ncl_filedump, or from
> ncl_convert2nc,
> > I can only see one record, the 2nd record. My work-around is to use
> wgrib2
> > to extract the record I want and then use ncl to process it.
> >
> > I am wondering if there are ways to access the 1st record in ncl.
> >
> > I am using ncl 6.1.2 (not OPeNDAP-enabled pre-compiled binary)
> >
> > Thanks.
> >
> >
> > Winston
> >
> >
> > Winston Hao
> > New York State Dept of Environmental Conservation
> > 625 Broadway, 9th Floor, Albany, NY 12233-3259
> > whao@dec.state.ny.us (518)402-8384 (Work) (518)402-9035 (Fax)
> >
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-- 
Gerry Creager
NSSL/CIMMS
405.325.6731
++++++++++++++++++++++
“Big whirls have little whirls,
That feed on their velocity;
And little whirls have lesser whirls,
And so on to viscosity.”
Lewis Fry Richardson (1881-1953)

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Received on Wed Mar 6 12:37:53 2013