[ncl-talk] plotting spatial average of wind vector from wrf output

[sangeeta maharjan]

Hi,

I have been using  " vector = wrf_vector(a,wks,u10,v10,opts)" for plotting
wind vector distribution from wrf output.

Inorder to plot the monthly average spatial wind vector distribution , I
computed the average of u10_avg and v10_avg .

On using the same function, " vector =
wrf_vector(a,wks,u10_avg,v10_avg,opts)", I got a very odd plot distribution.

As mentioned in "Technical note of  averaging wind speed and direction" by
Stuart K. Grange , average wind direction  is arctan(u10_avg/v10_avg)+flow

where flow =+ 180  for arctan (u10_avg/v10_avg) < 180
                  =- + 180  for arctan (u10_avg/v10_avg) >180

Could you kindly suggest how to plot wind vectors from averaged u and v
components.

Any help is appreciated.

Kind regards,
Sang
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