[gradsusr] Question about why the wind vectors barbs not showing up for the 0-6 KM Shear difference

[Jeff Duda]

The way you're doing it, you're only computing the difference in wind
speed between two layers.  If you're trying to calculate vertical wind
shear, you should be calculating the vector difference, which is the
difference in the components.  So you should have a delta-U wind
component of the shear (u500-usfc) and a delta-V component of the
shear (v500-vsfc).  Those are the two quantities you would display to
get the vectors.

Jeff

On Sun, Sep 1, 2013 at 3:39 PM, Nimrod Micael <nmicael at aggies.ncat.edu> wrote:
> I see Jeff. So then how would i make it to display the magnitude of u,v for
> 2 different levels then? Since I am taking the difference between the 500 mb
> wind and the sfc wind?
>
>
>
> On Sun, Sep 1, 2013 at 4:33 PM, Jeff Duda <jeffduda319 at gmail.com> wrote:
>>
>> displaying wind barbs requires two inputs in the display command
>> (i.e., 'd u;v').  You are only supplying one.
>>
>> Jeff Duda
>>
>> On Sun, Sep 1, 2013 at 2:53 PM, Nimrod Micael <nmicael at aggies.ncat.edu>
>> wrote:
>> > The shaded is plotting fine but the wind barb is not showing up. Can
>> > anyone
>> > help me out why?
>> >
>> > 'set gxout shaded'
>> > 'set lev 1000'
>> > 's= mag(u,v)'
>> > 'set lev 500'
>> > 'a = mag (u,v)'
>> > 'set cmin 20'
>> > 'bulk = (a-s)*1.92'
>> > 'd bulk'
>> >
>> > 'set gxout barb'
>> > 'set lev 1000'
>> > 'barbs= mag(u,v)'
>> > 'set lev 500'
>> > 'barba = mag (u,v)'
>> > 'set cmin 20'
>> > 'bulkb = (barba-barbs)*1.92'
>> > 'd bulkb'
>> >
>> >
>> > Wind vectors are not showing up. Why???
>> >
>> > Thanks.
>> >
>> > --
>> > Nimrod Micael
>> >
>> > _______________________________________________
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>> > gradsusr at gradsusr.org
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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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>
>
>
>
> --
> Nimrod Micael
>
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>



-- 
Jeff Duda
Graduate research assistant
University of Oklahoma School of Meteorology
Center for Analysis and Prediction of Storms