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10 Cards in this Set
- Front
- Back
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air mass |
huge bodies of air that form over water or land in tropical or polar regions |
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fronts |
form at the boundaries between air masses; there are four different types. |
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warm front |
when a warm air mass collides and rides over a col air mass; produces long periods of precipitation and warmer temperatures |
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cold front |
when a cold air mass collides and slides under a warm air mass; may produce thunderstorms and sometimes tornadoes and cooler temperatures |
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stationary front |
when neither a cold air mass nor a warm air mass moves at a frontal boundary; may produce long period of precipitation |
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occluded front |
when a cold air mass pushes into a warm air mass that is behind a cool air mass, the warm air mass is pushed up above the cooler air masses; may produce long periods of precipitation |
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high pressure system |
usually signal more fair weather with winds circulating around the system in a clockwise direction |
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low pressure system |
often result in rainy and/or stormy weather conditions with winds circulating in a counterclockwise direction |
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tornado |
a rapidly whirling, funnel-shaped cloud that extends down from a storm cloud |
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hurricane |
a low pressure tropical storm that forms over warm ocean water |
