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