Tornadoes
What is a tornado? (From Wikipedia)

A tornado is a violently rotating column of air which is in contact with both the surface of the earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloud. Tornadoes come in many sizes but are typically in the form of a visible condensation funnel, whose narrow end touches the earth and is often encircled by a cloud of debris.
Most tornadoes have wind speeds between 40 mph (64 km/h) and 110 mph (177 km/h), are approximately 250 feet (75 m) across, and travel a few miles (several kilometers) before dissipating. Some attain wind speeds of more than 300 mph (480 km/h), stretch more than a mile (1.6 km) across, and stay on the ground for dozens of miles (more than 100 km).
Although tornadoes have been observed on every continent except Antarctica, most occur in the United States. They also commonly occur in southern Canada, South-Central and eastern Asia, East-Central South America, Southern Africa, Northwestern and Southeast Europe, Italy, Western and Southeastern Australia, and New Zealand.

This is a tornado which is also called the waterspout: http://www.geckoandfly.com/wp-content/uploads/2007/05/singapore_waterspout_tornado_sea.jpg This Picture at the bottom shows a picture of how the tornado has the
destructive and how the power of the tornado effects the surroundings.
http://classwww.gsfc.nasa.gov/CAGESite/images/tornado3.gif
external image singapore_waterspout_tornado_sea.jpgtornado3.gif

Tornado came from the Spanish word "tronada" which means "thunderstorm". then it was combined with the Spanish word Tornar which means "to turn". and as a whole it meant a thunderstorm that turns/spins. Later on, the U.S scientists saw the very first tornado and made a nickname for it... "The Deadly Tornado".

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