Question

Cumulonimbus clouds are also known as thunderstorm clouds.

Answer 1

Cumulonimbus or nimbus clouds are the only clouds that produce thunderstorms with hail, lightning, and thunder. They form in warm weather, warm air creates clouds that are 20,000 feet or more in size. Cold and warm air collides, causing rain, thunder, lightning, hail, and sometimes severe storms like tornados.

Answer 2

More commonly known as thunderclouds, cumulonimbus is the only cloud type that can produce hail, thunder and lightning. The base of the cloud is often flat, with a very dark wall-like feature hanging underneath, and may only lie a few hundred feet above the Earth's surface.