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Beaufort wind scale Force 7

Meteorology
Typography

Force 7

− Wind speed 28 − 33 kn or 13.9-17.1 m/sec

mean, 30 kn or 15 m/sec

(Sea heaps up and white foam from breaking waves begins to be blown in streaks along the direction of the wind) 

BEAUFORT WIND SCALE FORCE 7

Photograph − G J Simpson,, Courtesy of the Meteorological Office

 

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