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Environmental Science
Supercell Thunderstorms and Tornadoes
Tornado Formation: Supercell Thunderstorms
air-mass thunderstorms don’t form tornadoes
not big enough and don’t have enough energy
most tornadoes are produced within supercell thunderstorms
huge updraft of air causes wind shear and tilts the thunderstorm
tilt allows warm air to rise into central portions of the storm, while rain and hail fall in the front
cold air (containing rain and hail) doesn’t extinguish the storm like in an air-mass thunderstorm
storm moves laterally
most tornadoes are produced by supercell thunderstorms
30% of supercell thunderstorms produce tornadoes
How Strong Are Tornadoes?
very high speed winds
up to 310 mph
blow away buildings and tress
thrown debris acts like bullets or shrapnel
break windows, kill people
fast winds can blow away roofs, then exposed walls are easily blown over
Storm Movement
in the Northern Hemisphere, tornadoes and thunderstorms tend to move northeast due to prevailing winds
the most tornadoes happen in Oklahoma
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