A Colorado storm chaser was in Cheyenne last week to show off his TIV2 Mad Max-style weather tank made famous by the ...

MOLINE, Ill. — For the first time in more than a decade, the United States has recorded an EF5 tornado, which is the strongest classification. But the newly confirmed rating may have implications that ...

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

A tornado that killed three people in North Dakota this summer was upgraded Monday to an EF5, the first such tornado in the U.S. in 12 years. Level 5 is the highest rating on the Enhanced Fujita scale ...