What type of clouds often signify a potential for downbursts?

Cumulonimbus clouds are indeed the type associated with downbursts, which are powerful downdrafts that can occur during thunderstorms. These clouds are characterized by their towering, anvil-shaped tops and significant vertical development, often forming in unstable atmospheric conditions. As warm, moist air rises within these clouds, it cools and condenses, leading to the formation of precipitation. When this heavy rain falls, the cooling effect can cause the surrounding air to rush downwards rapidly, resulting in the potential for a downburst.

This phenomenon is particularly dangerous for aviation and sailing, as downbursts can create sudden and severe wind changes, which can affect control and stability. In contrast, the other cloud types listed do not typically indicate such potential for downbursts. Stratiform clouds are generally associated with stable weather patterns and gradual precipitation, Cirrus clouds are high-altitude wispy clouds that do not indicate significant storm activity, and Stratus clouds signal overcast conditions or light rain rather than the violent weather associated with cumulonimbus clouds. Understanding the relationship between cloud types and weather phenomena is crucial for safety in sailing and flying.