A deadly severe weather outbreak spawned at least one tornado in 22 states from May 15-21. Among the hardest-hit states were ...

It may be hard to believe that with an average of 1,200 tornadoes each year in the United States, we haven’t seen an EF5-rated twister in more than 11 years. But that doesn’t mean the number ...

Tornadoes are among the strongest and deadliest types of weather, capable of destroying entire neighborhoods in minutes. However, the most powerful tornadoes, classified as EF5, make up less than 1% ...

May 20, 2013, marks the last time the United States was hit by the worst type of tornado. On that date, a monster EF5 tornado tore a 17-mile path through the Oklahoma City suburbs, creating "40 ...

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MOLINE, Ill. — A new study published by the American Meteorological Society has shed light on a puzzling phenomenon: The United States has not logged an EF5 tornado, the most violent category ...

But what are EF5 tornadoes, and are they different from their F5 counterparts? Here are all the available details regarding the nomenclature of the chaotic natural phenomena. Simply put ...

The Enhanced Fujita scale rates tornadoes from EF0 to EF5 based on damage ... of the University of Chicago, in 1971 introduced the Fujita Scale, which rates tornado intensity based primarily ...