What characterizes a squall in meteorological terms?

A squall is specifically characterized by a sudden and significant increase in wind speed that is often accompanied by changes in weather conditions, such as rain or thunderstorms. This sharp increase in wind velocity typically lasts for a short duration, distinguishing it from other wind events that may be prolonged or stable.

In meteorology, squalls are significant because they can pose hazards to pilots and mariners due to their unpredictability and intensity. Understanding squalls is crucial for flight safety since they can lead to sudden changes in aircraft performance and control.

The other options describe different phenomena related to weather. A brief shower of rain does not encompass the sudden wind intensity linked to squalls. A long-lasting wind event would suggest a more stable and persistent condition rather than the transient nature of a squall. Lastly, a gentle breeze is the opposite of a squall, lacking the sudden increase in intensity and impact associated with this meteorological term.