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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 ... If the air mass is colder than the ground below it, it is labeled k. .... surface of the tongue of warm air aloft formed during the occlusion process of the ... front is a non-moving (or stalled) boundary between two air masses, neither of  ...

en.wikipedia.org/wiki/Warm_front

... off and its moisture condenses, forming clouds and possibly precipitation. A warm front is a density discontinuity located at the leading edge of a homogeneous warm air ... If the warm air mass is unstable, thunderstorms may be embedded among the stratiform clouds ahead of the front, and after frontal passage ...

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 ... This upward motion causes lowered pressure along the cold front and can cause the formation of a narrow line of showers ... with intermittent light precipitation if the warm airmass being displaced by the cold front is mostly stable.

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

A front is the boundary at which two air masses of different temperature and moisture ... high winds are absent, is also necessary for the formation of an air mass. ... The first letter, written in lower case, indicates whether the air mass ... Neither mass is strong enough to displace the other, and essentially no movement occurs.

www.encyclopedia.com/earth-and-environment/atmosphere-and-weather/weather-and-climate-terms-and-concepts/air-masses-and

Get information, facts, and pictures about Air Masses and Fronts at ... A front is the boundary at which two air masses of different temperature and moisture ... When that happens, the two bodies of air act almost as if they are made of ... Neither mass is strong enough to displace the other, and essentially no movement occurs .

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

Air Mass is an extremely large body of air whose properties of temperature and moisture content (humidity), at any given ... uniform surface composition - flat; light surface winds ... It is usually fairly stable and dry, and if it becomes stagnant over the midwest, results in a drought. ... A cold front is cold air displacing warm air.

dslavsk.sites.luc.edu/courses/phys478/classnotes/air-masses-fronts.pdf

A warm front occurs when a warm air mass advances and replaces a cold air mass. ... and cooler air:If we consider two air parcels at the same elevation, the warmer ... surface readings made in the cold wedge will register cooler temperatures ...

www.climateandweather.net/world-weather/factors-that-influence-weather.html

Along a cold front, cold air displaces warm air; along a warm front, warm air displaces cold air. When neither air mass displaces the other, a stationary front ...

www.cengage.com/resource_uploads/downloads/0495555061_137425.pdf

that leads to cloud formation is quite different from that associ- ... Air displaced upward will cool ... If the air parcel is warmer than the atmospheric air at the selected ... considered neutral; it will neither rise nor sink but will remain at ..... Frontal precipitation takes place when a warm air mass rises ..... front within the westerlies.).