Tornadoes are a relatively rare event. Only a tiny percentage of thunderstorms ever go on to produce a tornado. No two twisters are alike—and some of those storms are truly bizarre. From twin ...

The most rare and extreme form of tornado struck eastern North Dakota in June, but experts just determined how strong it ...

The National Weather Service said the EF5 twister in North Dakota packed winds stronger than 200 mph, underscoring risks that ...

The nation's longest "drought" between EF5 tornadoes has come to an end, scientists from the National Weather Service ...

Teacher captures the moment the EF-5 tornado hit Briarwood Elementary. May 23, 2013— -- Cellphone video recorded by an Oklahoma teacher at Briarwood Elementary School shows the exact moment an ...

Meteorologists said this week that a deadly tornado in North Dakota this summer has been upgraded to a top-of-the-scale EF5, and was the first on American soil in 12 years.

Two historic, extreme weather events separated by just over 100 miles happened on one July day in the upper Midwest. On July 18, 1996, 29 years ago this evening, a violent tornado roared through the ...

For the first time in 12 years, the United States has recorded an EF5 tornado, the most powerful type of twister on the Enhanced Fujita wind and damage scale, the National Weather Service confirmed ...

We've discussed May's deserved reputation for both violent tornadoes and large outbreaks. In Texas, two of its worst tornadoes of all time happened in the middle of May, each in one of the state's ...