Definition

Noun: A squall line is a line of thunderstorms, often severe, that forms along or ahead of a cold front. It is characterized by a continuous, narrow band of active weather.

Usage

A squall line is a specific meteorological phenomenon. It is used to describe a dangerous weather feature that can produce strong winds, heavy rain, lightning, and sometimes tornadoes.

Examples

• The National Weather Service issued a warning for a squall line moving rapidly across the state.
• Pilots were advised to reroute to avoid the intense squall line developing along the front.
• We could see the dark, ominous cloud of the squall line approaching from the west.

Advanced Usage

• Pre-frontal squall line: A squall line that develops ahead of the actual surface cold front.
• The term is often used in conjunction with other severe weather terminology, such as "bow echo" (a bow-shaped segment within a squall line known for producing damaging winds).

Variants and Related Words

• Squall (noun): A sudden, violent gust of wind, often accompanied by rain, snow, or sleet. (Note: A is a single, intense event, while a is an organized line of such activity.)
• Derecho (noun): A widespread, long-lived wind storm associated with a fast-moving band of severe thunderstorms, often taking the form of a squall line.

Synonyms

• Thunderstorm line
• Line of storms

Related Phrases

• Quasi-linear convective system (QLCS): A more technical meteorological term often used synonymously with "squall line," emphasizing its linear structure.

Noun

1. a cold front along which squalls or thunderstorms are likely