What is a squall?

A squall is defined as a strong wind that typically occurs with sudden onset and an increase in speed. It is characterized by a sharp rise in wind intensity, often associated with weather disturbances such as thunderstorms or cold fronts. When a squall occurs, it can lead to rapid changes in weather conditions, including increased winds and potential precipitation.

The definition aligns with meteorological observations, where squalls can significantly impact both maritime and aviation operations due to their unexpected nature and intensity. Understanding this phenomenon is essential for weather forecasting and safety measures, particularly when predicting severe weather events.

The other options do not accurately describe what a squall is. A gradual increase in temperature, heavy rainfall without wind, and a mild snowstorm with winds do not encompass the sudden and intense wind changes characteristic of a squall. Thus, the correct choice effectively conveys the essential traits of this meteorological event.