Wind Article

wind?!?!?!?!!?

ok how high mph is there usually wind when theres liek a bad storm or tornado are winds 20mph bad ?

Public Comments

1. 20 MPH is a light breeze tornado's can reach in excess of 250 MPH
2. 20 mph bad? Not at all. A Severe Thunderstorm has to have winds of 58 mph or higher. Winds are measured on the Beaufort Scale. Here it is below: Beaufort number Wind speed Mean wind speed (kt / km/h / mph) Description Wave height Sea conditions Land conditions Sea state photo kt km/h mph m/s m ft 0 0 0 0 0-0.2 0 / 0 / 0 Calm 0 0 Flat. Calm. Smoke rises vertically. 1 1-3 1-6 1-3 0.3-1.5 2 / 4 / 2 Light air 0.1 0.33 Ripples without crests. Wind motion visible in smoke. 2 4-6 7-11 4-7 1.6-3.3 5 / 9 / 6 Light breeze 0.2 0.66 Small wavelets. Crests of glassy appearance, not breaking Wind felt on exposed skin. Leaves rustle. 3 7-10 12-19 8-12 3.4-5.4 9 / 17 / 11 Gentle breeze 0.6 2 Large wavelets. Crests begin to break; scattered whitecaps Leaves and smaller twigs in constant motion. 4 11-15 20-29 13-18 5.5-7.9 13 / 24 / 15 Moderate breeze 1 3.3 Small waves. Dust and loose paper raised. Small branches begin to move. 5 16-21 30-39 19-24 8.0-10.7 19 / 35 / 22 Fresh breeze 2 6.6 Moderate (1.2 m) longer waves. Some foam and spray. Smaller trees sway. 6 22-27 40-50 25-31 10.8-13.8 24 / 44 / 27 Strong breeze 3 9.9 Large waves with foam crests and some spray. Large branches in motion. Whistling heard in overhead wires. Umbrella use becomes difficult. 7 28-33 51-62 32-38 13.9-17.1 30 / 56 / 35 Near gale 4 13.1 Sea heaps up and foam begins to streak. Whole trees in motion. Effort needed to walk against the wind. 8 34-40 63-75 39-46 17.2-20.7 37 / 68 / 42 Gale 5.5 18 Moderately high waves with breaking crests forming spindrift. Streaks of foam. Twigs broken from trees. Cars veer on road. 9 41-47 76-87 47-54 20.8-24.4 44 / 81 / 50 Severe gale 7 23 High waves (6-7 m) with dense foam. Wave crests start to roll over. Considerable spray. Light structure damage. 10 48-55 88-102 55-63 24.5-28.4 52 / 96 / 60 Storm 9 29.5 Very high waves. The sea surface is white and there is considerable tumbling. Visibility is reduced. Trees uprooted. Considerable structural damage. 11 56-63 103-119 64-73 28.5-32.6 60 / 112 / 70 Violent storm 11.5 37.7 Exceptionally high waves. Widespread structural damage. 12 64-80 120 74-95 32.7-40.8 73 / 148 / 90 Hurricane 14+ 46+ Huge waves. Air filled with foam and spray. Sea completely white with driving spray. Visibility greatly reduced. Considerable and widespread damage to structures Tornado winds vary. Their wnds are based on the Enhanced Fajita Scale. It's based on a scale of 0-5. In order to be considered an F0 the winds have to be at least 65 mph. Here's the enhanced Fajita Scale below: Category EF0 Wind speed 65–85 mph 105–137 km/h Light damage. Peels surface off some roofs; some damage to gutters or siding; branches broken off trees; shallow-rooted trees pushed over. Category EF1 Wind speed 86–110 mph 138–178 km/h Moderate damage. Roofs severely stripped; mobile homes overturned or badly damaged; loss of exterior doors; windows and other glass broken. Category EF2 Wind speed 111–135 mph 179–218 km/h Considerable damage. Roofs torn off well-constructed houses; foundations of frame homes shifted; mobile homes completely destroyed; large trees snapped or uprooted; light-object missiles generated; cars lifted off ground. Category EF3 Wind speed 136–165 mph 219–266 km/h Severe damage. Entire stories of well-constructed houses destroyed; severe damage to large buildings such as shopping malls; trains overturned; trees debarked; heavy cars lifted off the ground and thrown; structures with weak foundations blown away some distance. Category EF4 Wind speed 166–200 mph 267–322 km/h Devastating damage. Well-constructed houses and whole frame houses completely leveled; cars thrown and small missiles generated. Category EF5 Wind speed >200 mph >322 km/h Incredible damage. Strong frame houses leveled off foundations and swept away; automobile-sized missiles fly through the air in excess of 100 m (109 yd); high-rise buildings have significant structural deformation; incredible phenomena will occur. So far only one EF5 tornado has been recorded since the Enhanced Fujita Scale was introduced on February 1, 2007