Wind barb size and winds less than 5kts

[Mary Jo Nath]

To plot barbs when wind speed >= 5kts,  try using "maskout":

d maskout(u,mag(u,v)-5.); v     \* would plot barbs if wind speed >= 5. only

Dan Leins wrote:
> All,
>
> Can anyone tell me how I can specify the size of wind barbs?  I'm
> plotting winds at various levels and the barbs I'm getting are quite
> large, too large for my display.  I've already decreased the thickness
> of the barbs but I need to make them even smaller. Also, I'd like to
> know how I can set up GrADS to display only wind barbs of 5kts or
> greater, perhaps with zeroes in place of the light winds. Right
> now I've got light winds under a surface ridge but am showing wind
> barbs all over the place.  Something to squash these barbs and with
> make them zeroes or invisible would be more representative and a lot
> less noisy.
>
> Thanks!
>
> Dan Leins