Force 10
− Wind speed 48 − 55 kn or 24.5-28.4 m/sec
mean 52kn or 27 m/sec
(Very high waves with long overhanging crests. The resulting foam, in great patches, is blown in dense white streaks along the direction of the wind. On the whole, the surface of the sea takes a white appearence. The tumbling of the sea becomes heavy and shock-like. Visibility affected)
Photograph − Environment Canada
