When a cumulus cloud is much taller than it is wide, it is often called a towering cumulus (TCU) cloud. The taller these clouds are, the more likely they are to produce showers, and sometimes waterspouts.
A towering storm builds over Caracas, Venezuela. A classic example, Cumulonimbus, incus, mamma (mammatus),
Cumulonimbus - Turbulence: Everything You Need to Know. Askethepilot.com