[gradsusr] GRIB2 / GRIB1 Data

[Andrew Revering]

I have to type this out before my brain explodes and I forget everything..

 

I'm plotting some RUC model data. 

 

- When I try to create the CTL file off of a GRIB2 file using g2ctl and
display it in GrADS, GrADS gives me an error:                "Unknown Grib2
Index Version Number"

 

Ok, so I convert it to Grib1 then plot it.

 

- When I convert the Ruc GRIB2 to GRIB1 using cnvgrib, I have a hunch that
it's not converting the GRIB file correctly all the time because.

 

                1) If I manually try to execute cnvgrib.exe through a cmd
prompt (using windows) it seems it will occasionally get an error that is
resolved by rebooting the computer. The error says it could be a problem
with cygwin1.dll and it also suggests rebooting. so I reboot and try again
and it works.

                2) In my automated system that uses this Grib2->Grib1 step,
some data is good, and others are really odd. it seems like its missing data
or perhaps the data isn't even packed correctly. Other runs of data are
fine.

 

 

So with all that said I guess my questions are:

- Why does GrADS give me the "Unknown Grib2 Index Version Number" error if I
try to load a Grib2 file, and how do I work around that?

- Why would cnvgrib.exe not work without error unless I do a reboot of the
PC?

 

I'll also take any other ideas on how to load grib data so it is properly
read reliably.

 

 

 

Andrew Revering

Convective Development, Inc.

http://www.convectivedevelopment.com/

 

 

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