What is the minimum wind speed that characterizes a squall?

What is the minimum wind speed that characterizes a squall?

• A. 5 knots.
• B. 30 knots.
• C. 50 knots.
• D. 16 knots.

Answer: (D)

A squall is a sudden, sustained jump in wind speed, not just a brief gust. The defining threshold used in weather and aviation is a minimum increase of 16 knots, lasting about a minute or more. This makes 16 knots the smallest change that still qualifies as a squall—larger values describe stronger wind events but aren’t the threshold itself. Choices like 5 knots would be too small to define a squall, while 30 or 50 knots exceed the minimum criterion and describe more extreme conditions. In practice, squalls often come with convective weather and can be accompanied by rapid changes in visibility and precipitation.

A squall is a sudden, sustained jump in wind speed, not just a brief gust. The defining threshold used in weather and aviation is a minimum increase of 16 knots, lasting about a minute or more. This makes 16 knots the smallest change that still qualifies as a squall—larger values describe stronger wind events but aren’t the threshold itself. Choices like 5 knots would be too small to define a squall, while 30 or 50 knots exceed the minimum criterion and describe more extreme conditions. In practice, squalls often come with convective weather and can be accompanied by rapid changes in visibility and precipitation.