Caught in the Storm tells the story of a deadly EF5 tornado in Joplin, Missouri, and here's why storms are classified this ...

The most powerful and deadliest tornado ever to hit the state of Iowa occurred around the Charles City area on May 15, 1968.

Tornado classifications have evolved since the original Fujita (F scale) was developed in 1971. Under the original F scale, an F5 rating was given as follows: “Whole frame houses tossed off ...