Meteorologists said this week that a deadly tornado in North Dakota this summer has been upgraded to a top-of-the-scale EF5, ...

It was the strongest classification of tornado and the first confirmed on American soil in a dozen years, meteorologists said ...

A powerful tornado struck Enderlin, North Dakota, on June 20, causing significant damage and leading to a rare EF5 classification after new research. Here's what went into the new research that led to ...

The twister, which took the lives of three people on the night of June 20, was first thought only to be an EF-3 after an ...