[gradsusr] Cannot draw vectors/barbs -- U field all undefined

Zilore Mumba zmumba at gmail.com
Tue Jan 14 07:56:19 EST 2020


Hello to all. The above error is one that has appeared several times in the
past, from my searching in the archives. However I have yet to find a
definitive answer to solve this error.
Previously (say 3-4 months ago) I could display WRF output in grads at any
level. However lately and currently am not able to display WRF output other
than at the surface.
I am working in Ubuntu 18.04. Grads-2.2.1 (installed with apt install) and
grads-1.8sl11 (install manually) both give the same result.
I am wondering if it is ARWpost which needs adjusting or the data is no
good.
I will appreciate any assistance
Below is the output I get trying to display fields above the surface. I
also attach my namelist.ARWpost
LEV set to 850 850
ga-> d skip(u,4,4);v
Data Request Warning:  Request is completely outside file limits
  Entire grid contents are set to missing data
  Grid limits of file:     X = 1 73  Y = 1 60  Z = 1 32  T = 1 7  E = 1 1
  Grid limits of request:  X = 1 73  Y = 1 60  Z = 850 850  T = 1 1  E = 1
1
  Warning issued for variable = u
Data Request Warning:  Request is completely outside file limits
  Entire grid contents are set to missing data
  Grid limits of file:     X = 1 73  Y = 1 60  Z = 1 32  T = 1 7  E = 1 1
  Grid limits of request:  X = 1 73  Y = 1 60  Z = 850 850  T = 1 1  E = 1
1
  Warning issued for variable = v
Cannot draw vectors/barbs -- U field all undefined
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