What characterizes a cumulus cloud?

A cumulus cloud is characterized by its formation in conditions where there are strong updrafts, which often occur in unstable atmospheric conditions. These clouds appear as fluffy, white puffs and typically indicate rising air, which is characteristic of convection. They can develop into larger storm clouds if the instability and moisture are sufficient, leading to more severe weather.

The presence of strong updrafts is crucial because they allow these clouds to grow vertically, forming the distinctive cumulus shape. In contrast, some other cloud types do not form under the same conditions or exhibit the same structural characteristics, demonstrating why focusing on the role of updrafts and atmospheric instability is essential to understanding cumulus clouds.