c a r o l i n e, e l, a n d s a r a h. warm fronts a warm front is the boundary between warm air and...
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Fronts
Caroline, El, and Sarah
Warm Fronts • A warm front is the boundary between warm air and cool air as warm air replaces cool air.
• A warm front brings widespread precipitation.
• It brings days of bad weather: rain, snow, sleet, or freezing rain, often at the same time.
• The air behind a warm front is more moist and warm than the air ahead of it.
• Warm fronts move from southwest to northeast.
Cold Fronts
• When a cold air mass replaces a warm air mass it creates a cold front.
• Most of the time cold fronts move faster than any other front.
• Cold fronts usually are easier to find on a weather map than any other front.
• Cooler weather, clearing skies, and sharp change in one direction are usually caused by a cold front.
• Sometimes a good indicator that a cold front is near is that there is an abrupt change in temperature.
Stationary Fronts• Stationary fronts are the
boundaries between air masses that have stopped advancing.
• Stationary fronts often bring days of cloudy , wet weather.
• The boundary can be thousands of feet above the ground or a couple of miles away from the surface front.
• Clouds and precipitation will form as warm air runs over cool air along a stationary front if there is enough humidity in the air.
Occluded Fronts
• Occluded fronts involve 3 air masses of different temperatures: cold air, cool air, and warmer air.
• Occluded fronts can form when a cold air mass goes toward colder air with warmer air between the two.
• The cool air forces the warmer air up, closing off the warm air from the surface.
Conclusion
• Weather fronts are the boundaries between warm and cool air. The masses of air have different densities and are usually caused by temperature differences.
• When warm and cold air stop moving, it causes a stationary front.
• When a warm front catches a cold front, it produces an occluded front.
• When cold air replaces warm air in a transition zone, it makes a cold front.
• When warm air replaces cold air, it makes a warm front.
Bibliography
• www.wikipedia.com• www.usatoday.com• Alabama Science Book• http://ww2010.atmos.uiuc.edu
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