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

The EF5 Enderlin tornado is the first EF5 in the United States since the May 20 ... The only known maximum strength tornadoes ...

Preliminary ratings for the twister came in at EF3. Rafferty says the specific damage that led to the EF5 rating ended up ...

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

The United State's hasn't had an EF-5 tornado touch down since 2013 however, on Monday, the National Weather Service Grand ...

The first EF5 tornado was confirmed in North Dakota, here's a history and the last F5 tornadoes to hit Michigan.

Meteorologists say a deadly tornado in North Dakota this summer has been upgraded to a top-of-the-scale EF5, and was the ...

New forensic damage analysis confirms Enderlin, ND tornado exceeded 210 MPH winds, ending the longest streak without an EF-5 ...

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

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.

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 ...