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A cold front is defined as the transition zone where a cold air mass is replacing a warmer air mass. Cold fronts generally move from northwest to southeast. The air behind a cold front is noticeably colder and drier than the air ahead of it.
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ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/af/frnts/cfrnt/de...
ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/af/frnts/cfrnt/def.rxml
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If warmer air is replacing colder air, then the front should be analyzed as a warm front. If colder air is replacing warmer air, then the front should be analyzed as a cold front. Common characteristics associated with warm fronts have been listed in the table below.
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ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/af/frnts/wfrnt/de...
ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/af/frnts/wfrnt/def.rxml
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USATODAY.com Latest News ... The term "cold front" is one of meteorology's most misused terms. Many people say "cold front" when they are really talking about the mass of cold air that moves in behind the front. (Related graphic: All about air masses).
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www.usatoday.com/weather/tg/wcfront/wcfront.htm
www.usatoday.com/weather/tg/wcfront/wcfront.htm
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USATODAY.com Latest News ... Think again. A warm front is the boundary between warm and cool, or cold, air when the warm air is replacing the cold air. That sounds like what you want. However, warm fronts often bring days of inclement weather.
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www.usatoday.com/weather/tg/wwfront/wwfront.htm
www.usatoday.com/weather/tg/wwfront/wwfront.htm
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Cold front - Wikipedia, the free encyclopedia
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A cold front is defined as the leading edge of a cooler and drier mass of air, replacing (at ground level) a warmer mass of air. The cooler, denser air wedges under the less dense warmer air, liftin...
en.wikipedia.org/wiki/Cold_front
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What is a Cold Front? ... As the cold front develops the warm air behind the front is pushed up over the top of the cold air. This happens because the warm air is lighter than the cold air. You often see clouds forming at a cold front. This is because as the warm air rises, it cools and condenses.
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www.ecn.ac.uk/Education/cold_fronts.htm
www.ecn.ac.uk/Education/cold_fronts.htm
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A warm air front is the place where a warm air mass replaces a cool air mass. We already know that warm air overrides cold air. This is because the air masses have different temperatures and densities. Warmer tropical air is forced over the cooler polar air.
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www.ecn.ac.uk/Education/warm_fronts.htm
www.ecn.ac.uk/Education/warm_fronts.htm
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A side view of a cold front (A) and how it is represented on a weather map (B) ; Click on image for full size (94 Kb); Windows to the Universe image by Lisa Gardiner ... A cold front is where a cold air mass is pushing into a warmer air mass. Cold fronts can produce dramatic changes in the weather. They move fast,
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www.windows.ucar.edu/tour/link=/earth/Atmosphere/tstorm...
www.windows.ucar.edu/tour/link=/earth/Atmosphere/tstorm/cold_front.html
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