SIOUX CITY (KTIV) - A June tornado in North Dakota has been upgraded to an EF-5, ending a 12-year streak without the most ...

This is the third F-5/EF-5 in the state of North Dakota since records started being kept in 1953. Violent (EF-4 and EF-5) tornadoes are a very rare occurrence in the state, with only 1-2 occurring in ...

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, ...

A deadly tornado that tore across southeastern North Dakota this summer has been upgraded to an EF5 with winds topping 200 mph (322 kph), the strongest classification of tornado and the first ...

SIOUX FALLS, S.D. (KELO) — A significant outbreak of severe weather struck KELOLAND last night. Severe winds, large hail, and tornadoes were all reported in the region. Latest forecast and damage ...

SIOUX FALLS, S.D. (KELO) — Monday’s storm system produced two tornadoes in Gregory County and a third near Alvord, Iowa, in Lyon County, the National Weather Service said on Thursday. The Iowa tornado ...

A deadly tornado that ripped through a rural city in North Dakota in June has been upgraded to an EF-5, the National Weather Service said Monday, marking the first U.S. twister with an EF-5 rating in ...

The severe thunderstorms on July 28 produced two damage-causing tornadoes in South Dakota, plus a third across the border in Iowa, according to the National Weather Service in Sioux Falls. The first ...

Thunderstorms expected to develop in the late afternoon on July 28 could combine to form a derecho over eastern South Dakota, according to the National Weather Service's Weather Prediction Center. The ...