What is the weather phenomenon known as a nonfrontal, narrow band of active thunderstorms that often develop ahead of a cold front?

• A. Tropical cyclone
• B. Isolated shower
• C. Squall line
• D. Microburst

Answer: (C)

A squall line is a narrow, elongated band of thunderstorms that forms in a nonfrontal setting and often develops ahead of a cold front. It organizes along a convergence zone where warm, moist air rises vigorously, creating a line of storms that can span many miles. You’ll typically see strong, gusty surface winds, heavy rain, lightning, and possible turbulence as the line passes, which is a major concern for pilots, especially gliders, when encountering sudden changes in wind and lift.

Tropical cyclones are large tropical storms with circular circulation, not a linear band of storms. An isolated shower is just a single storm cell, not a line. A microburst is a very strong downdraft within a storm, a localized event, not a line of storms extending for many miles.