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Beaufort wind scale Force 11

Meteorology
Typography

Force 11

− Wind speed 56 − 63 kn or 28.5-32.6 m/sec

mean 60kn or 31 m/sec (Exceptionally high waves.)

(Small and medium sized ships might be for a time lost to view behind the waves.) The sea is completely covered with long white patches of foam lying along the direction of the wind. Everywhere the edges of the wave crests are blown into froth. Visiblity affected.) 

BEAUFORT WIND SCALE FORCE 11

Photograph − Environment Canada

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