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Beaufort wind scale Force 12

BEAUFORT WIND SCALE FORCE 12

Force 12

− Wind speed greater than 63kn or 32.7 m/sec

(The air is filled with foam and spray. Sea completely white with driving spray; visibility very seriously affected)  

BEAUFORT WIND SCALE FORCE 12

Photograph − Captain J. F. Thomson, Courtesy of the Meteorological Office

 

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BEAUFORT WIND SCALE FORCE 11

Beaufort wind scale Force 11

NAABSA (Not Always afloat but Safely Aground).