warm front

(redirected from warm fronts)
Also found in: Dictionary, Thesaurus.
Related to warm fronts: cold fronts, occluded fronts

warm front

Meteorol the boundary between a warm air mass and the cold air above which it is rising, at a less steep angle than at the cold front

warm front

[′wȯrm ‚frənt]
(meteorology)
Any nonoccluded front, or portion thereof, which moves in such a way that warmer air replaces colder air.

warm front

warm frontclick for a larger image
Warm front as shown on a weather chart.
A front along which warm air replaces cold air. If the warm air mass progressively passes over ground previously covered by cold air, the front will be a warm front. As this front passes an observer, the heavy-stratus type of clouds and any existing precipitation will give way to a partial or complete clearing of the skies.