Tornados, cyclones and hurricanes



tornado latin tonare, to thunder violent whirling wind, characteristically accompanied by a funnel-shaped cloud extending down from a cumulonimbus cloud. commonly known as a twister or cyclone, a tornado can be a few meters to about a kilometer wide where it touches the ground, with an average width of a few hundred meters. it can move over land for distances ranging from short hops to many kilometers, causing great damage wherever it descends. the funnel is made visible by the dust sucked up and by condensation of water droplets in the center of the funnel. the same condensation process makes visible the generally weaker sea-going tornadoes, called waterspouts that occur most frequently in tropic waters. most tornadoes spin counterclockwise in the northern hemisphere and clockwise in the southern, but occasional tornados reverses this behavior.
the exact mechanisms that cause a tornado to form are still not fully unde...