warm front

American  

[wawrm fruhnt] / ˈwɔrm ˌfrʌnt /

noun

Meteorology.

1. a transition zone between a mass of warm air and the colder air it is replacing.

---

warm front British  

noun

1. 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 Compare cold front occluded front

---

warm front Scientific  

1. 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.

2. Compare cold front occluded front See illustration at front

---

Etymology

Origin of warm front

First recorded in 1920–25

Compare meaning

How does warm-front compare to similar and commonly confused words? Explore the most common comparisons:

• cold front vs. warm front

Example Sentences

See Examples For:

warm front

The storm system is expected to move east and drag a warm front across the area Friday, followed by a cold front Friday evening into Saturday.

From Los Angeles Times ● Nov. 17, 2023

The warm front is more like a giant dome of warmth; it’s spinning clockwise and shielding the Southeast and mid-Atlantic states from the storm’s effects.

From Los Angeles Times ● Feb. 22, 2023

Lots of work from transportation crews as well as warmer temperatures allowed Snoqualmie Pass to reopen Christmas Day, and with a warm front moving through, post-holiday highway travel should continue to improve.

From Seattle Times ● Dec. 25, 2022

Meteorologists attributed the weather to a warm front that had hovered above the area for an extended period, bringing with it several inches of rain.

From New York Times ● Jan. 9, 2022

She added, after an interval, smoothing the warm front of her dress, and putting her foot on the fender, "What did those theatre-tickets cost?"

From A Modern Instance by William Dean Howells