Which cloud type is tall, gray, and commonly associated with thunderstorms?

Which cloud type is tall, gray, and commonly associated with thunderstorms?

• A. Cirrocumulus
• B. Altostratus
• C. Nimbostratus
• D. Cumulonimbus

Answer: (D)

Tall, dark gray clouds that grow rapidly into vertical towers are cumulonimbus. They form when warm, moist air rises strongly (convection) and carries moisture upward until it condenses at higher levels, creating significant vertical development. The base often appears gray and is associated with heavy precipitation, while the top can spread into an anvil shape. This cloud type is the classic sign of a thunderstorm, bringing lightning, heavy rain, hail, and sometimes tornadoes. Other listed types are more limited in vertical growth: high patchy cirrocumulus, flat mid-level altostratus, or broad, continuous rain-bearing nimbostratus, none of which match the tall, storm-associated appearance described. So the described cloud is cumulonimbus.

Tall, dark gray clouds that grow rapidly into vertical towers are cumulonimbus. They form when warm, moist air rises strongly (convection) and carries moisture upward until it condenses at higher levels, creating significant vertical development. The base often appears gray and is associated with heavy precipitation, while the top can spread into an anvil shape. This cloud type is the classic sign of a thunderstorm, bringing lightning, heavy rain, hail, and sometimes tornadoes. Other listed types are more limited in vertical growth: high patchy cirrocumulus, flat mid-level altostratus, or broad, continuous rain-bearing nimbostratus, none of which match the tall, storm-associated appearance described. So the described cloud is cumulonimbus.