[gradsusr] Cannot able to plot NARR data

[kalyan chakravarthy]

Hi Everyone,

By using NARR data, I am trying to plot the thickness between 500-1000mb
levels. I am having an ctl file to open the grib file.

I have used the following commands to read and plot the file

Open model.ctl
set lat y1 y2
set lon x1 x2
define thick=HGTprs(lev=500)-HGTprs(lev=1000)
d thick

But I didn't see any shaded or contours drawn. Can anyone helpme with the
problem.

I have attached the data files.

Thanks in advance
Kalyan​
 model.ctl
<https://drive.google.com/file/d/0B5GylLRnzAPJeFBpUDNPOFc3aGM/view?usp=drive_web>
​​
 narr-a_221_20100927_0600_000.grb
<https://drive.google.com/file/d/0B5GylLRnzAPJaG4tMTd5YkpxWTg/view?usp=drive_web>
​​
 narr-a_221_20100927_hh00_000.idx
<https://drive.google.com/file/d/0B5GylLRnzAPJWHBOQjRGMFJwZlU/view?usp=drive_web>
​
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