Description

So just how fast is the wind blowing? Beaufort Wind Scale 0 --- Calm less than 1 mph (0 m/s) Smoke rises vertically 1 --- Light air 1 - 3 mph

0.5-1.5 m/s Smoke drifts with air, weather vanes inactive 2 --- Light breeze 4 - 7 mph

2-3 m/s Weather vanes active, wind felt on face, leaves rustle 3 --- Gentle breeze 8 - 12 mph

3.5-5 m/s Leaves & small twigs move, light flags extend 4 --- Moderate breeze 13 - 18 mph

5.5-8 m/s Small branches sway, dust & loose paper blows about 5 --- Fresh breeze 19 - 24 mph

8.5-10.5 m/s Small trees sway, waves break on inland waters 6 --- Strong breeze 25 - 31 mph

11-13.5 m/s Large branches sway, umbrellas difficult to use 7 --- Moderate gale 32 - 38 mph

14-16.5 m/s Whole trees sway, difficult to walk against wind 8 --- Fresh gale 39 - 46 mph

17-20 m/s Twigs broken off trees, walking against wind very difficult 9 --- Strong gale 47 - 54 mph

20.5-23.5 m/s Slight damage to buildings, shingles blown off roof 10 -- Whole gale 55 - 63 mph

24-27.5 m/s Trees uprooted, considerable damage to buildings 11 -- Storm 64 - 73 mph

28-31.5 m/s Widespread damage, very rare occurrence 12 -- Hurricane over 73 mph

over 32 m/s Violent destruction