Tornado

Tornado
Tornadoes are violent windstorms that are also called twisters or cyclones. Extremely fast, rotating columns of air descend from cumulonimbus clouds and the winds can either cause explosions within buildings or sweep objects up into its eye. A tornado sounds like a thundering train coming through. Tornadoes occur all over the world except on the two poles and are the most common in the U.S. A tornado over water is called a cyclone. They occur in unstable air, as that caused by a thunderstorm. In the center of a tornado, winds can get to 400 miles per hour (650 km).