What type of clouds should you be wary of when boating?

Cumulonimbus clouds are significant to boating safety due to their association with severe weather conditions. They are tall, dense clouds that often indicate thunderstorms and can produce heavy rain, strong winds, lightning, hail, and tornadoes. When these clouds are present, boaters should be especially cautious as they can change weather conditions rapidly and dangerously.

Unlike the other cloud types listed, which may not indicate such immediate and severe weather phenomena, cumulonimbus clouds signal potential for severe turbulence and severe thunderstorms. Therefore, it's essential for anyone on the water to recognize these clouds and take appropriate precautions to ensure their safety when they are observed in the sky.