Which type of cloud is commonly associated with thunderstorms?

Cumulonimbus clouds are the types of clouds most commonly associated with thunderstorms. These towering clouds can reach high altitudes and are known for their ability to produce severe weather phenomena, including heavy rain, lightning, hail, and tornadoes. The structure of cumulonimbus clouds is characterized by a significant vertical development, which is caused by strong updrafts of warm, moist air. As this air rises, it cools and condenses, forming the cloud that can lead to stormy weather.

In contrast, cumulus clouds generally indicate fair weather and lack the vertical development necessary for thunderstorms. Stratus clouds are typically uniform and can often bring light precipitation, but they do not form from the intense convection that is characteristic of thunderstorm activity. Nimbostratus clouds, while also associated with precipitation, are more stable and produce continuous, steady rain rather than the intense conditions associated with thunderstorms. Thus, cumulonimbus clouds are distinct in their ability to generate the turbulence and moisture needed for thunderstorms.