Back Front Types

Front Types

Name Symbol Description
Cold front Cold front Formed when a cold air mass replaces a warm air mass
Warm front Warm front Formed when a warm air mass replaces a cold air mass
Stationary front Stationary front A slow-moving or stalled front between warm and cold air masses
Occluded front Occluded front Formed when a cold front overtakes a warm front
Surface trough Surface trough An elongated region of relatively low atmospheric pressure
Tropical wave Tropical wave An atmospheric trough moving from east to west across the tropics
Squall line Squall line A line of continuous or broken active thunderstorms
Dry line Dry line A boundary separating moist and dry air masses