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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 ... In addition, areas of precipitation help determine the frontal type and location. ... A warm front moves more slowly than the cold front which usually follows ...

en.wikipedia.org/wiki/Cold_front

A cold front is defined as the leading edge of a cooler mass of air, replacing at ground level a ... A cold front's location is at the leading edge of the temperature drop off, which in an isotherm analysis .... Cold fronts form when a cooler air mass moves into an area of warmer air in the wake of a developing extratropical cyclone.

en.wikipedia.org/wiki/Warm_front

A warm front is a density discontinuity located at the leading edge of a homogeneous warm air mass, and is typically located on the equator-facing edge of an isotherm gradient. Warm fronts lie within broader troughs of low pressure than cold fronts, and move more slowly than the cold fronts which usually follow because cold air ... As the air mass rises into regions of lower pressure, it expands and cools.

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 ...

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.climateandweather.net/world-weather/weather-fronts.html

A cold weather front is defined as the changeover region where a cold air mass ... a short distance is a good indicator that a front is located somewhere in between. ... Warm fronts usually move from southwest to northeast and the air behind a ...

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 ... Shallow leading edge warm air must "overrun" cold air--cold air recedes moves slow ...

www.scienceclarified.com/A-Al/Air-Masses-and-Fronts.html

Cold fronts. A cold front develops when a cold air mass moves into an area occupied by a warm air mass. Because cold air is heavier or more dense than warm ...

nationalgeographic.org/encyclopedia/air-mass

Mar 30, 2011 ... An air mass is a large volume of air in the atmosphere that is mostly uniform ... to the stratosphere—16 kilometers (10 miles) into the atmosphere. ... When winds move air masses, they carry their weather conditions (heat or cold, dry ... Tropical air masses form in low-latitude areas and are moderately warm.