What type of cloud is typically associated with thunderstorms?

Cumulonimbus clouds are specifically associated with thunderstorms due to their towering structure and significant vertical development. These clouds are capable of reaching high altitudes and often exhibit an anvil-shaped top, which indicates their strength and intensity. Within these clouds, severe weather phenomena such as heavy rain, lightning, hail, and even tornadoes can develop.

The presence of cumulonimbus clouds signifies instability in the atmosphere, which is a critical factor for thunderstorm formation. As warm, moist air rises, it cools and condenses within these clouds, leading to energetic updrafts that contribute to the storm's development. This characteristic distinguishes cumulonimbus clouds from other types, as they are specifically formed under conditions conducive to severe weather, unlike stratus, cirrus, or altostratus clouds, which generally do not produce thunderstorms or severe weather conditions.