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Wind Speed Rating, Besufort Scale

Wind Speed Rating, Beaufort Scale
BeaufortNameWind Speed Description
NumberMPHKPHDescription
00calm <1<1 calm, smokes rise vertically
01light air 1 - 31 - 5 wind direction shown by smoke, not vanes
02light breeze 4 - 76 - 11 wind felt on face, leaves rustle, vane moves
03gentle breeze 8 - 1212 - 19 leaves, twigs moving, wind extends flag
04moderate breeze13 - 1820 - 28 dust, loose paper raised, small branches move/
05fresh breeze 19 - 2429 - 38 small leaved trees sway, wave crests on inland waters
06strong breeze 25 - 3139 - 49 large branches move, overhead wires whistle, umbrella problematical
07moderate or near gale32 - 3850 - 61 whole trees sway, walking against wind hard
08fresh gale or gale 39 - 4662 - 74 twigs break off trees, cars hard to steer
09strong gale 47 - 5475 - 88 light structural damage, shingles torn loose
10storm or whole gale55 - 6389 - 102 trees uprooted, considerable structural damage
11storm or violent storm64 - 72103 - 117widespread damage
12hurricane > 72> 117 widespread damage

74 mph is defined as a hurricane in the U.S.



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