77% were rated either F0/EF0 or F1/EF1. Violent tornadoes — those rated F4/EF4 and F5/EF5 — are much rarer. Only 89 such tornadoes were reported during the same time period, accounting for 0.9 ...

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

Tornadoes in the U.S. typically increase sharply in spring. Unfortunately, a few of those can be violent tornadoes, particularly in the South. On March 3, 1966, 59 years ago today, an F5 tornado ...

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 ...

Each year, an average of 15 tornadoes hits Michigan, according to the National Weather Service. A tornado that ripped through Livonia last year was fatal. Twisters also can cause millions of ...