14 terms

Storms

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Terms in this set (...)

thuderstorm
forms from a cumulonimbus cloud- usually brief, heavy storm that consists of rain, strong winds, lightning, and thunder
lightning
is an electric discharge that occurs between a positively charged area and a negatively charged area- can occur between two clouds or between the bottom of a cloud and the ground
thunder
the sound caused by lightning- the sound that results from a rapid expansion of air along an electrical strike
flooding
can be caused by heaving rains during a thuderstorm
tornado
forms at low pressure systems- destructive, rotating colum of air that has very very high wind speeds, low central pressure that touches the ground
funnel cloud
spinning column of air that moves at the bottom of a cumulonimbus cloud
hurricane
a severe storm that develops over tropical oceans and whose strong winds of more 120 km/h spiral in toward the intensely low-pressure center
condensation
a hurricane gets its energy from this process
eye
calm center of a hurricane- a core of warm, relatively calm air with low pressure and light winds
eye wall
surroounds the eye- a group of cumulonimbus clouds that produce heavy rains and strong winds- this is the strongest part of the hurricane
rain bands
spiraling bands of clouds that circle the hurricane-they produce heavy ranins and high winds
Colder water and land
_____________ water and __________ causes a hurriance to die because they do not provide the warm moist air the hurricane needs to power itself
Tornado Alley
located in the central part of the US- where most tornadoes occur becasue of a continental polar air mass from Canada mixes with a maritime tropical air mass from the Gulf of Mexico
equator
most hurricanes originate in this area in the tropics

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