Beaufort wind arrows


It seems the wind arrow feathers, which I assume are based on the beaufort wind scale, seem to be 1 force too low for the wind speed indicated.
Closed Jul 8, 2015 at 2:22 PM by DocHal


DocHal wrote Jul 8, 2015 at 2:07 PM

The wind barbs are based on the wind speed in knots and follow the recommendations of the World Meteorological Organisation. Half barbs represent about 5 knots (actually, 2.5-7.5 knots) and whole barbs represent about 10 knots (7.5-12.5 knots).

wrote Jul 8, 2015 at 2:22 PM