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

A deadly tornado that tore across southeastern North Dakota this summer has been upgraded to an EF5 with winds topping 200 ...

A deadly tornado that tore across North Dakota this summer has been upgraded to an EF5 with winds over 200 mph, the strongest classification of tornado and the first on American soil in 12 years, ...

Tornado experts upgraded the deadly June 20 North Dakota twister to the rarest, strongest rating: EF5. With winds over 210 mph, it's the first in the U.S. in years.

Each year, Oklahomans prepare to hunker down during the months of April, May and June, otherwise known as "tornado season." Most tornadoes and severe weather spawn during this turbulent time in North ...

The roof of Northeastern Health System hospital in Sallisaw, Oklahoma was torn off Tuesday as severe storms swept through eastern Oklahoma and northern and central Arkansas. Brad Taylor with Sequoyah ...

Oklahoma could see late-night storms with potential wind speeds of 50 to 60 mph and quarter-sized hail, particularly ...

Oklahoma isn't done with the severe weather threat after thunderstorms and strong winds moved through the state overnight. >> Go to the KOCO weather page | Get KOCO on the Go | Subscribe to KOCO 5's ...

A rare, monstrous EF5 tornado that struck the United States more than three months ago was the first of its kind in more than ...