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Beaufort wind scale Force 9

Meteorology
Typography

Force 9

− Wind speed 41 − 47 kn or 20.8-24.4 m/sec

mean 44kn or 22 m/sec

(High waves. Dense streaks of foam along direction of the wind. Crests of waves begin to topple, tumble and roll over. Spray might affect visibility) 

BEAUFORT WIND SCALE FORCE 9

Photograph − Environment Canada

 

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