Drops rain or snow
Cumulonimbus
cumulonimbus cloud
What causes a cumulonimbus cloud is the cold and warm fronts that colided.
There is no such thing as a cumulonimbus tornado. A cumulonimbus cloud is a ver large towering cloud. Most thunderstorms are cumulonimbus clouds, and some of the strongest of these storms are what produce tornadoes.
The entire thunderstorm is a cumulonimbus cloud.
cumulonimbus
A cumulonimbus cloud produces rain.
A cumulonimbus cloud produces rain.
cumulonimbus
A tornado has a funnel and is at the bottom of a cumulonimbus cloud. If its winds do not reach the ground, though it is just a funnel cloud.
A cumulonimbus cloud/thunderstorm cloud
Hail comes from cumulonimbus clouds.