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Chp 20 Weather...

Weather Patterns and Severe Storms

QuestionAnswer
air mass an immense body of air in the troposphere that is characterized by similar temperatures and amount of moisture at any given altitude
front when two air masses meet, they form a front which is a bounday that separates two contrasting air masses
cold front forms when cold, dense air moves into a region occupied by warmer air.
stationary front forms when the surface position between two air masses does not move
occluded front forms when a cold front overtakes a warm front, producting a complex weather pattern
middle-latitude cyclone a large center of low pressure that generally travels from west to east and causes stormy weather.
warm front forms when warm air moves into an area formerly covered by cooler air.
thunderstorm form when warm, humid air rises in an unstable environment - low pressure system
tornado violent windstorm that takes the form of a rotating column of air called a vortex, with extends downward from a cumulonimbus cloud all the way to the ground. Most associated with severe thunderstorms - low pressure system
hurricane a whirling tropical cyclone with sustained high winds that sometimes developover the ocean when water temperatures are warm enough to provide the necessary heat and moisture to fuel the storm - low pressure system
eye a zone of scattered clouds and calm averaging about 20 kilometers in diameter at the center of a hurricane
eye wall the doughnut-shaped area of intense cumulonimbus development and very strong winds that surrounds the eye of a hurricane
storm surge a dome of water abuot 65-80 kim wide that sweeps across the coast where a hurricane's eye moves onto land.
Created by: melaniebird
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