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

Davide Sacchetti davide.sacchetti at arpal.gov.it
Tue Jan 14 09:28:34 EST 2020


it may be you did a SET Z when you should have done a SET LEV:
grads answer is:
 Grid limits of file:     X = 1 73  Y = 1 60  Z = 1 32
 Grid limits of request:  X = 1 73  Y = 1 60  Z = 850 850

850 is a typical pressure level, not a level number

Bye bye
Davide

On Tue, 2020-01-14 at 14:56 +0200, Zilore Mumba wrote:
> 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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