[gradsusr] Error in using skew.gs

Tue Dec 18 13:15:58 EST 2012

Amulya,
Thank you for adding the new information.  I can tell that the value of the
script variable mix, which is given as 1573660000, cannot be right.  Check
line 2424 of your script code.  That is where the variable mix is
computed.  Insert say statements for all the component variables there.
With this kind of investigation you will eventually be able to discover the
source of the error.  My gut tells me one of the input variables you
supplied to the script in the main function call plotskew() is not what the
script is expecting it to be.  I'm guessing it is the dewpoint variable.
But I saw your control file and it appears there should not be a problem
with that.  Nonetheless, insert say statements to find out what the values
are, then go from there.  If you need help knowing what to do next or where
to look, please ask.

Jeff

On Tue, Dec 18, 2012 at 1:21 AM, Amulya Chevuturi <
amulya.chevuturi at gmail.com> wrote:

> Thank you very much for replying Mr. Jeff.
>
> I have added the lines as stated. In the output all of them are showing
> numeric values only. So I cannot make out what the problem is. Could you or
> anyone in the grads user list help me out further.
>
> This the output I am getting at the terminal when I am running the skew.gswith the changes you suggested.
>
> ga-> skew.gs
> No hardcopy metafile open
> All files closed; all defined objects released;
> All GrADS attributes have been reinitialized
> Initial Time is 00Z08JAN2007
> Create gif images as well (1=yes ; 0=no)
> 0
> Please enter coordinated for sounding
>
> Latitude values between: 4.96654 and 50.0419
> Enter Latitude
> 33
>
> Longitude values between: 48.3967 and 105.603
> Enter Longitude
> 78
>
> Overlay two time periods 1=yes ; 0=no
> 0
>
> Please enter time to plot
> Available times: 1 to 17
> 5
> Drawing temperature sounding.
> Drawing dewpoint sounding.
> 286.893
> 43.385364499893
> 1573660000
> Non-numeric args to numeric operation
>   Error occurred on line 2430
>   In file skew.gs
>   Error occurred on line 1106
>   In file skew.gs
>   Error occurred on line 69
>   In file skew.gs
>
> I am attaching the skew.gs file with the changes added. Please let me
> know how I can further correct the error. Thank you for the help in advance.
>
> With regards,
> Amulya Chevuturi
> Junior Research Fellow (Ph.D. Student)
> Jawaharlal Nehru University
> New Delhi, India
>
> On Tue, Dec 18, 2012 at 1:06 AM, Jeff Duda <jeffduda319 at gmail.com> wrote:
>
>> Amulya,
>> I looked through your script and I can't find the cause of the error.
>> I've used this script on WRF-ARW output myself before (also postprocessed
>> using ARWpost).  I remember having some issues getting the script to run
>> properly the first time, but I got around that somehow.  The errors
>> indicate that in this line
>>
>> thetae=theta*exp((3.376/TLcl-0.00254)*mix*1.0+0.00081*mix)
>>
>> one of theta, TLcl, or mix is not being computed correctly.  I'm not sure
>> which of those it is, although you could put SAY statements just above that
>> line for each of the variables to see which it is.  What I mean is, insert
>> these lines
>> say theta
>> say TLcl
>> say mix
>> Above the line I copied above.  Then see what values get spit out.  One
>> of those is either a NaN of some sort or has characters where there should
>> be numbers.
>>
>>
>> Jeff Duda
>>
>> On Mon, Dec 17, 2012 at 12:56 AM, Amulya Chevuturi <
>> amulya.chevuturi at gmail.com> wrote:
>>
>>> Dear GrADS users,
>>>
>>> I have recently tried to use the skew.gs script to plot Skew-T/Log-P
>>> graphs for my WRF (ARW) output. I use ARWPost as my post processing
>>> software. This is the problem that is cropping up.
>>>
>>> ga-> skew.gs
>>> No hardcopy metafile open
>>> All files closed; all defined objects released;
>>> All GrADS attributes have been reinitialized
>>> Initial Time is 00Z08JAN2007
>>> Create gif images as well (1=yes ; 0=no)
>>> 0
>>> Please enter coordinated for sounding
>>>
>>> Latitude values between: 4.96654 and 50.0419
>>> Enter Latitude
>>> 33
>>>
>>> Longitude values between: 48.3967 and 105.603
>>> Enter Longitude
>>> 78
>>>
>>> Overlay two time periods 1=yes ; 0=no
>>> 0
>>>
>>> Please enter time to plot
>>> Available times: 1 to 17
>>> 5
>>> Drawing temperature sounding.
>>> Drawing dewpoint sounding.
>>> Non-numeric args to numeric operation
>>>   Error occurred on line 2427
>>>   In file skew.gs
>>>   Error occurred on line 1106
>>>   In file skew.gs
>>>   Error occurred on line 69
>>>   In file skew.gs
>>>
>>> Though I think it is plotting the temperature and dewpoint. The rest of
>>> the parameters in the line 69 is not being plotted due to some errors in
>>> parameters. I am attaching my ctl file and skew.gs. Please let me know
>>> how to correct the problem.
>>>
>>> Thanking you in advance.
>>>
>>> With regards,
>>> Amulya Chevuturi
>>> Junior Research Fellow (Ph.D. Student)
>>> Jawaharlal Nehru University
>>> New Delhi, India
>>>
>>> _______________________________________________
>>> gradsusr mailing list
>>> gradsusr at gradsusr.org
>>> http://gradsusr.org/mailman/listinfo/gradsusr
>>>
>>>
>>
>>
>> --
>> Jeff Duda
>> Graduate research assistant
>> University of Oklahoma School of Meteorology
>> Center for Analysis and Prediction of Storms
>>
>>
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>>
>
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-- 
Jeff Duda
Graduate research assistant
University of Oklahoma School of Meteorology
Center for Analysis and Prediction of Storms
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