Warm-front meaning

A front along which an advancing mass of warm air rises over a mass of cold air.
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(meteorol.) The forward edge of an advancing mass of warm air that replaces colder air, usually while causing steady precipitation.
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The forward edge of an advancing mass of warm air that rises over and replaces a retreating mass of cooler air. As it rises, the warm air cools and the water vapor in it condenses, usually forming steady rain, sleet, or snow. On a weather map, a warm front is depicted as a red line with half circles whose curved sides point in the direction in which the warm air is moving.
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(meteorology) A warm front is the trailing edge of a retreating mass of cold air.
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