Re: calculating prevailing wind direction?

From: Dennis Shea <shea_at_nyahnyahspammersnyahnyah>
Date: Wed Oct 12 2011 - 14:23:30 MDT

Also ... see the Wind Rose Examples

On 10/12/11 2:21 PM, Dennis Shea wrote:
> From wind speed and direction
> (meteorological wind direction (wdir): eg E=90, S=180, W=270)
> (1) calculate u and v
> u = -wspd*sin(wdir)
> v = -wspd*cos(wdir)
>
> (2) calculate the monthly mean of each wind component:
> uave, vave
>
> (3) transform to wspd and wdir
> WSPD = sqrt(uAve^2+vAve^2)
> WDIR = atan2(uAve,vAve)/rad +180. ; mean wind direction [0,360]
>
> Good Luck
> On 10/12/11 2:07 PM, Ufuk Utku Turuncoglu (BE) wrote:
>> Hi,
>>
>> I just wonder that is there anybody calculate the monthly prevailing
>> wind direction from hourly wind direction data. I have both wind
>> direction (like N, NNE, SE etc.) and speed. What do you suggest?
>>
>> Regards,
>>
>> --ufuk
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Received on Wed Oct 12 14:23:35 2011

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