What is a sign that dangerous weather may be approaching?

Accumulating dark clouds are a significant sign that dangerous weather, such as thunderstorms or heavy rain, may be on the horizon. When you observe a buildup of dark clouds, it often indicates that moisture is being collected in the atmosphere, potentially leading to severe weather conditions. These clouds, particularly cumulonimbus clouds, are associated with thunderstorms and can signal the onset of lightning, wind, rain, and even tornadoes.

In contrast, clear skies typically suggest stable weather conditions, pooling water may indicate recent rain but does not necessarily predict impending weather changes, and strong sunlight often indicates fair weather rather than approaching storms. This understanding is critical for boaters who need to be aware of changing weather conditions to ensure safety on the water.