The deadly tornado that ripped through rural Enderlin, North Dakota, in June has been upgraded from EF4 to an EF5, making it the strongest tornado and first EF5 in the United States in more than a ...

WASHINGTON — An EF5 tornado struck North Dakota this year, the National Weather Service confirmed Monday, marking the first tornado of that strength in more than a decade on American soil. The ...

The nation's longest "drought" for the most extreme type of tornado has come to an end, scientists from the National Weather Service announced. The tornado that ended the 12-year gap actually hit back ...

Add Yahoo as a preferred source to see more of our stories on Google. A speed limit sign on 170th Street just west of Gilbert was blown over by a tornado that touched down on July 18. This photo was ...

New research shows how advanced weather models can warn about tornado danger earlier and help communities prepare with more time.