Wind barbs in m/s

[Javier G. Corripio]

The script meteogram_gfs.gs from the GRADS  script library (http://
www.iges.org/grads/gadoc/library.html) draws wind barbs in meters per
second ( or miles per hour in 'e' option).

Isn't this confusing, as standard plots for wind barbs are always in
knots.

To correct this, change line 283
'd uwnd;vwnd'

by

'd 1.943846*u;1.943846*v'

I guess this should work

Jgc

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