Tornadoes: Maximum Destruction winds

SCIENCE
Anyone who has seen the movie "Twister" will know that the force of nature is not a childs game, that has the power of creation and destruction and manages to balance on Earth. Tornadoes are a unique and extraordinary ... to watch on TV ... for being in the middle of one can be very fierce and destructive.
A tornado is a weather phenomenon that consists of a funnel of air violently broken, the lower end is in contact with the surface of the earth and a cumulonimbus cloud top or, exceptionally, with the base of a cumulus cloud is This is the most intense atmospheric phenomenon known.
Tornadoes come in many sizes and shapes but generally have the shape of a funnel cloud, whose narrow end touches the ground and is usually surrounded by a cloud of debris and dust. Most tornadoes have winds reaching speeds between 65 and 180 km / h, measured about 75 meters wide and move several miles before disappearing. The most extreme wind speeds may have to be rotated to 450 km / h or more, measuring up to 2 km wide and remain touching the floor along more than 100 km of recorrido.2 April 3
Tornadoes are detected by pulse Doppler radar and visually by storm chasers. They were observed on every continent except Antarctica. However, the vast majority of the world's tornadoes occur in the U.S. region known as Tornado Alley. They also occasionally occur in south-central and eastern Asia, northern and east-central South America, Southern Africa, northwestern and southeast Europe, western and southeastern Australia and New Zealand.
There are several different scales to rate the strength of tornadoes. The Fujita scale evaluates by damage caused, and has been replaced in some countries by the Enhanced Fujita scale, an updated version of the previous one. F0 or EF0 tornado, the weakest category, cause damage to trees but not structures. F5 or EF5 tornado, the strongest category, rips buildings off their foundations and can produce significant structural deformations skyscrapers.
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