Can cumuolnibus clouds form a tornado?

Cumulus clouds can develop into cumulonimbus clouds, which are usually thunderstorms. All thunderstorms contain an updraft, which is a rising air current. Under the right conditions this updraft can...

Tornadoes are produces by cumulonimbus clouds. Often a wall cloud and/or funnel cloud are seen before or during a tornado.

There isn't an actual answer to this, because that's not how tornadoes work. The sky (not the clouds) does often turn a peculiar color when conditions are favorable for tornadoes to form, but it's...

Yes. Tornadoes form from cumulonimbus clouds.

Clouds themselves are not what forms a tornado, at least not directly. The process is complicated. First, a condition called wind shear, in which the speed or direction of the wind changes with...