cold front

cold front

n.

The leading portion of a cold atmospheric air mass moving against and eventually replacing a warm air mass.

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cold front

Noun

Meteorol the boundary line between a warm air mass and the cold air pushing it from beneath and behind

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cold front

The forward edge of an advancing mass of cold air that pushes under a mass of warm air. Cold fronts often cause precipitation; water vapor in the rising warm air condenses and forms clouds, often resulting in heavy rain, thunderstorms, hail, or snow. Winter cold fronts can cause temperatures to drop significantly. Summer cold fronts reduce humidity as drier, cooler air displaces the humid, warmer air. On a weather map, a cold front is depicted as a blue line with triangles that point in the direction in which the cold air is moving. Compare occluded frontwarm front See illustration at front.

Thesaurus

Noun

1.

cold front - the front of an advancing mass of colder air polar front front - (meteorology) the atmospheric phenomenon created at the boundary between two different air masses squall line - a cold front along which squalls or thunderstorms are likely