fronts, hurricanes and thunderstorms
DESCRIPTION
Fronts, Hurricanes and Thunderstorms. Front A front is when two air masses meet. The cold air is more dense, and will always sink. Warm front ~ this is when a warm air mass overtakes a cold air mass. Clouds associated with this are stratus clouds, with moderate rains. - PowerPoint PPT PresentationTRANSCRIPT
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Fronts, Hurricanes and Thunderstorms
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Front
A front is when two air masses meet. The cold air is more dense, and will always sink.
Warm front ~ this is when a warm air mass overtakes a cold air mass.
Clouds associated with this are stratus clouds, with moderate rains.
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A cold front is when cold air overtakes a warm air mass.
Generally cumulous clouds will form, with heavy and short lived rains.
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An occluded front is when a cold front catches up to another cold front, and lifts the warm air off of the ground.
Heavy rains can develop
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Polar Front
This is where the cold polar air meets the middle latitude air. It is across Nebraska is the winter, and north of the Great Lakes in the summer.
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Hurricanes
A tropical storm with winds of over 75 mph (120 kph) is a hurricane.
Hurricanes in Atlantic Ocean
Typhoon in Western Pacific
Cyclone in Indian Ocean and Southern Pacific
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A violent storm with lightning and thunder is a “thunderstorm”.
There are three stages
Cumulus Stage
Mature Stage
Disipating Stage
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Tornados
Funnel shaped, very violent storms
1. Can reach 300 miles per hour, usually less
2. Usually only 100 yards wide
3. Very survivable, unless something hits you
4. Called a waterspout over water
5. Called a white tornado over snow (very rare)
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