<div dir="ltr">Hi,<div><br></div><div>I have been using <span style="white-space:pre-wrap"><font color="#ff0000"> " vector = wrf_vector(a,wks,u10,v10,opts)" </font><font color="#000000"> for plotting wind vector distribution from wrf output.</font></span></div><div><span style="white-space:pre-wrap"><font color="#000000"><br></font></span></div><div><font color="#000000"><span style="white-space:pre-wrap">Inorder to plot the monthly average spatial wind vector distribution , I computed the average of u10_avg and v10_avg . </span></font></div><div><font color="#000000"><span style="white-space:pre-wrap"><br></span></font></div><div><font color="#000000"><span style="white-space:pre-wrap">On using the same function, </span></font><span style="color:rgb(255,0,0);white-space:pre-wrap"> " vector = wrf_vector(a,wks,u10_avg,v10_avg,opts)", </span><span style="white-space:pre-wrap"><font color="#000000">I got a very odd plot distribution.</font></span></div><div> </div><div>As mentioned in "Technical note of averaging wind speed and direction" by Stuart K. Grange , average wind direction is <font color="#0000ff">arctan(u10_avg/v10_avg)+flow</font></div><div><br></div><div>where<font color="#0000ff"> flow =+ 180
for arctan (u10_avg/v10_avg) < 180 </font></div><div><font color="#0000ff"> =- + 180 for arctan (u10_avg/v10_avg) >180 </font></div><div><font color="#0000ff"><br></font></div><div><font color="#000000">Could you kindly suggest how to plot wind vectors from averaged u and v components.</font></div><div><font color="#000000"><br></font></div><div><font color="#000000">Any help is appreciated.</font></div><div><font color="#000000"><br></font></div><div><font color="#000000">Kind regards,</font></div><div><font color="#000000">Sang</font></div></div>