What type of cloud is typically associated with thunderstorms?

Cumulonimbus clouds are typically associated with thunderstorms. These clouds are large, towering, and vertically developed, often reaching great heights in the atmosphere. Cumulonimbus clouds form in unstable atmospheric conditions, which allows for significant vertical growth and the development of strong updrafts and downdrafts.

As these clouds grow, they can produce severe weather phenomena, including heavy rain, lightning, hail, and even tornadoes. The characteristic anvil-shaped top of a mature cumulonimbus cloud can extend into the stratosphere, signifying the strength of the storm.

Other types of clouds like cumulus, stratus, and nimbostratus play different roles in weather systems. Cumulus clouds are generally associated with fair weather and do not typically produce significant storms. Stratus clouds are low-lying and often lead to overcast conditions without the intensity of thunderstorms. Nimbostratus clouds produce steady, continuous precipitation but do not have the towering structure and severe weather associated with cumulonimbus clouds. Therefore, cumulonimbus is the defining cloud type for thunderstorms due to its association with severe weather development.