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Severe Storms

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Term
Definition
Thunderstorm   Most common severe storm  
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T-Storm: Stage One   Strong updrafts push through heavy clouds, clouds build up, rain begins  
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T-Storm: Stage Two   Electric charges build up inside cloud, downdraft rubs against updraft causing sparks  
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T-Storm: Stage Three   Storm dies when the downdraft becomes stronger than the updraft  
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Thunder   The sound from superheated air expanding  
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Tornado   Violent whirling wind on the ground that forms a storm  
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T: Stage One   Dry, cold air mixes with warm, moist air  
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T: Stage Two   Strong convection current with an updraft  
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T: Stage Three   Air spins, pressure lowers, air spins faster  
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T: Stage Four   Funnel forms and touches ground  
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Water Spout   A tornado over water  
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Tornado Alley   Texas, Oklahoma, Kansas. and parts of the middle US; tornadoes form here because cold, dry air(from the northwest) and warm, moist air(from the Gulf of Mexico) mix there and it is relatively flat  
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Hurricane   Storms with low pressure centers that form over water  
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H: Stage One   Warm water and lots of evaporation, thunderstorms and low pressure  
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H: Stage Two   Winds spin counterclockwise causing small thunderstorms to be pulled together making larger ones  
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H: Stage Three   More evaporation causing lower pressure causing more evaporation, etc...  
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H: Stage Four   Low enough pressure causes faster winds that finally reach 75 mph, the beginning of a hurricane  
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H: Stage Five   Eye forms in the center of the storm  
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Tropical Depression   First sign of organized swirling  
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Tropical Storm   Winds reach 39 mph, remains a tropical storm until winds reach 74 mph then it becomes a hurricane  
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Storm Surge   Great rise of the ocean along the shore during a hurricane; can be 18 feet or more  
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Eye   The calm, quiet center of a hurricane; indicates 1/2 of the storm has passed  
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Created by: DEnglish
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