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en.wikipedia.org/wiki/Cold_front

A cold front over the eastern and central region of the United States of America. A cold front is defined as the leading edge of a cooler mass of air, replacing at ground level a .... Cold fronts form when a cooler air mass moves into an area of warmer air in the wake of a developing extratropical cyclone. The warmer air interacts ...

en.wikipedia.org/wiki/Weather_front

A weather (state of atmosphere) front is a boundary separating two masses of air of different ... Fronts separate air masses of different types or origins, and are located ... Cold fronts can produce sharper changes in weather and move up to twice ... the cold air ahead of the warm front and rides over the colder air mass while ...

www.answers.com/Q/When_a_cold_air_mass_moves_into_an_area_where_a_warm_air_mass_is_located_it_is_called_a

Is produced when a cold air mass moves into an area where a war air mass is located? Heat rises. So warm air rises in the atmosphere pushing the cooler air ...

www.answers.com/Q/When_a_warm_air_mass_moves_into_an_area_where_a_cold_air_mass_is_located_it_is_called_an

When a warm air mass moves into an area where a cold air mass is located it is called an? When a ... a cold front. Cold fronts often produce thunderstorms. Edit.

climate.ncsu.edu/edu/k12/.fronts

Aug 9, 2013 ... Figure A: Fronts Located on a Surface Weather Map. Image from The ... A warm front is the surface boundary between a warm air mass and a cold air mass it is overtaking. The warm air moves into an area of colder, drier air. The air masses ... Cold fronts are usually accompanied with areas of low pressure.

www.nationalgeographic.org/encyclopedia/air-mass

Mar 30, 2011 ... Air masses form over large surfaces with uniform temperatures and ... When winds move air masses, they carry their weather conditions (heat or cold, ... Tropical air masses form in low-latitude areas and are moderately warm.

cimss.ssec.wisc.edu/wxwise/class/frntmass.html

Source Regions are simply geographic areas where an air mass originates. ... polar latitudes P - located poleward of 60 degrees north and south; tropical ... cP continental polar cold, dry, stable ... mP -- Winter cP air moves over a region such as the NE Pacific, picking up some warmth and moisture from the warmer ocean.

ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/af/frnts/wfrnt/def.rxml

A warm front is defined as the transition zone where a warm air mass is ... Warm fronts generally move from southwest to northeast and the air behind a ... over a short distance is a good indication that a front is located somewhere in between.

en.wikibooks.org/wiki/High_School_Earth_Science/Changing_Weather

The weather in a location often depends on what type of air mass is over it. ... The heat and moisture leave the ground and move into the air above it, until the overlying air ... This brings heat to cold areas and cools down areas that are warm.