A violent whirling wind; specifically (Meteorol.), a tempest distinguished by a rapid whirling and slow progressive motion, usually accompaned with severe thunder, lightning, and torrents of rain, and commonly of short duration and small breadth; a small cyclone.
of Tornado
Yes, by definition a tornado is produced by s thunderstorm.
the teleology of a tornado is uncertain
There is no such thing as an actual tornado underwater, as a tornado is, by definition, a vortex of air. However, a vortex underwater is called a whirlpool.
No. A tornado is a very intense kind of whirlwind but most whirlwinds are not tornadoes. By definition a tornado is associated with a thunderstorm and connects to both the ground and the cloud base.
No. A whirlpool is simply a vortex in water. A tornado is a very specific kind of vortex that by definition take place in air.
maelstrom (whirlpool), though it should be noted that this should be called an underwater vortex as, by definition, a tornado is a vortex of air.
Yes. Part of a definition of a tornado is that it is a "violently rotating column of air."
A tornado is a rotating column of air that extends downward from a cloud and touches the ground.
A tornado is primarily composed of rotating air that forms a violently swirling column extending from a thunderstorm to the ground. This rotating air can reach extremely high wind speeds and is capable of causing significant damage.
A tornado anywhere is a violent event. If you mean by the technical definition of a violent tornado, one rated EF4 or EF5, such tornadoes do occur fairly regularly in Tornado Alley, but make up a very small minority of the tornadoes that occur there. As with most places, most of the tornadoes in Tornado Alley are rated EF0 or EF1.
It depends what you call a tornado. Most tornado-like clouds do not touch the earth's surface. Some say that until it touches the ground it is not a tornado but a funnel cloud; however the definition of a tornado does not state that it must touch the ground. It all depends on what you're taught.