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Chapter 16 section 2
Fronts
Cold Fronts
Definition:
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Cold air moves under warm air
Warm air rises, Moves quickly
Associated Weather:
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Brings thunderstorms, heavy rain or snow
Cooler dry weather follows
Warm Front
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Definition:
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Warm air moves over cold, denser air
Gradually replaces cold air
Associated Weather:
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Brings drizzly rain
Clear, warm weather follows
Occluded Front
Definition:
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Warm air mass caught between 2 colder air masses and the cold
mass moves under
Cold air mass pushes up the warm air mass
Associated Weather:
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Cool temperatures, large amounts of rain and snow
Stationary Front
Definition:
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Weak cold air mass meets a weak warm air mass AND both
remain separate.
It stops, becomes stationary because not enough wind to force
the other mass away
Associated Weather:
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Many days of cloudy, wet weather
Cyclones
Definition: Low pressure areas
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Air masses come together or converge and
rise
Winds spiral toward the center
Moves counterclockwise
Associated Weather:
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Causes stormy weather
Anticyclones
Definition:
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Areas of high pressure
Air moves apart, or diverges, and sinks
Cooler, denser air moves out of the high
pressure center
Moves clockwise
Associated Weather:
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Brings dry, clear weather