PITTSBURGH (KDKA) - On beautiful days full of sunshine ... They don't grow as high into the atmosphere as a cumulonimbus (thunderstorm) cloud. There is a reason for that. All clouds develop ...

Cumulonimbus clouds shoot up through the atmosphere, creating a tower known as an anvil - a clear sign thunderstorms are in the forecast. Their pouch-like appearance will make you do a double take ...

When cumulonimbus clouds grow high enough into ... There are a number of other unique and beautiful cloud types that can form as air rises over mountain slopes and other topography.

Thunderstorms are produced in cumulonimbus clouds, which are some of the largest clouds in the atmosphere. The base of these clouds is usually between 300m metres and 1km above the ground ...