Drawing wind barbs on a map

Hi-
I am trying to draw wind barbs on a map.

I am making a panel plot of station data, like so:
res@gsnDraw = False
res@gsnFrame = False
 plot(0) = gsn_csm_contour_map(wks,var(:,0),res)
...

The calling the overlay and barb routine:
 wmsetp("col",1)
 wmsetp("wbs",.05)
res1@gsnDraw = False
res1@gsnFrame = False

 plt = gsn_csm_contour(wks,frq(0,:),res1)
 wmbarbmap(wks,nlat,nlon,mu,mv)
 overlay(plot(0),plt)
...

Then call gsn_panel.

According to the examples on weather symbols this *should* work. But, alas,
no wind barbs on my map, and no errors to report. I thought maybe I had the
order of nlat and nlon incorrect but I tried it both ways and still nothing.

So do I need to somehow draw it first or should it be already overlaid on
plt?
Thanks for any insight...
jimmyc

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Received on Wed Mar 3 16:39:19 2010