[gradsusr] Incorrect Winds from NCEP NAM file

[Donald Van Dyke]

Hello,

I'm not sure if this is a grib2 file problem or a GrADS problem, but if 
I try to plot the winds from the attached NAM grib2 file from NCEP, the 
wind is plotted incorrectly.  I am using g2ctl.pl with no flags and 
gribmap -i to create the .ctl and .idx files.  In the GrADS script, I am 
using simple commands such as

"set lev 250"
"d mag(ugrdprs,vgrdprs)*1.943844449"
"d skip(ugrdprs*1.943844449,2,2);skip(vgrdprs*1.943844449,2,2)"

The image created is attached along with an image from NCEP showing what 
the winds should have looked like over my area in the Florida 
Panhandle.  They're obviously not northerly.  I am currently using 
grads.2.0.a9.  I have also attached the grib2 file as well as the .ctl 
file and .idx file I created with g2ctl.pl and gribmap.  Thanks.

-Don



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