What type of cloud is a tornado formed in?

Tornadoes are the world's most violent storms. The strongest winds likely approach 480 kilometers per hour (300 miles per hour), creating a fairly narrow, but catastrophic, track of destruction. read more

A funnel cloud is the immediate forerunner of a full-blown tornado. A funnel cloud descending from a thunderhead can wear many guises, from a slender, writhing whip to an only slightly tapering, elephantine block. read more

Towering cumulus clouds ,they spawn thunder storms and strong updrafts that can cause the air to swirl like water in a sink going down a drain, but a drain that is several miles high. read more

A funnel cloud is a funnel-shaped cloud of condensed water droplets, associated with a rotating column of wind and extending from the base of a cloud (usually a cumulonimbus or towering cumulus cloud) but not reaching the ground or a water surface. read more