Formation	Description	Classification		Occurrence				Prevention
Formation Tornados developed from a special kind of thunderstorm called a super cell. a Super cell is a long rotating thunderstorm10 to 16 km in diameters .Super cells for many tornados last many hours.
Characteristics Tornados are a violent  storm that causes a lot of damage. Tornados look like  a large gray funnel that extends from the air to the ground.
Occurrence The USA  has the highest average of tornados in the world about 800 per year. Tornados happen all over the us ,but the region with the most tornados is called a Tornado ally.  Tornados ally extends form the Texas Gulf Coastal plain to South Dakota .Another one of the high areas is the Dixie ally extending from The Gulf coastal plain from south Texas to eastward Florida.
Prevention Tornados cause lots of damage. The National weather service alerts the public to serve weather radio and television. You can't really prevent a Tornado, but you can to a couple of thing to protect you and your family. One is to build a Storm cellar under your home.
Characteristics  A direct measurement of a Tornado is very difficult and dangerous to obtain. In 1971 Theodore fajita  an  meteorology  professor at the university of Chicago created a way to classify tornados in terms of speed. This meted is called the Fajita scale. the Fajita scale goes form F0 the weakest to F5 the strongest. The Fajita scale only appeals to areas where there are man made made sutures .
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