An extensive forensic analysis of a deadly June tornado in North Dakota helped National Weather Service teams confirm the first EF-5 tornado in more than 12 years.

The most rare and extreme form of tornado struck eastern North Dakota in June, but experts just determined how strong it ...

The National Weather Service said the EF5 twister in North Dakota packed winds stronger than 200 mph, underscoring risks that ...

A deadly tornado that tore across North Dakota this summer has been upgraded to an EF5 with winds over 200 mph, the strongest ...

A deadly tornado that ripped through a rural city in North Dakota in June​ has been upgraded to an EF-5, the National Weather ...

The tornado carried fully loaded train cars nearly 500 feet in Enderlin, North Dakota, on June 20th. It's the first EF-5 tornado to strike the U.S. since 2013.

A twister that touched down in June was recently confirmed to be a rare EF-5 tornado. New York has seen its share of strong tornadoes, but has the state ever encountered an EF-5?

The National Weather Service has released a new rating for a tornado that hit North Dakota in June, making it the first EF-5 twister in the U.S. since one devastated Moore in 2013.

Level 5 is the highest rating on the Enhanced Fujita scale, which the National Weather Service has used to measure tornadoes since 2007. The tornado that wrecked the outskirts of Enderlin, N.D., on ...

A powerful tornado tore through districts north of Paris on Monday, toppling huge trees and construction cranes with deadly ...

The tornado uprooted trees, tore off roofs, injured at least nine people and killed one. French media said it was the country ...

According to the NWS final assessment, teams conducted additional surveys and worked with wind damage experts to estimate the Enderlin tornado's estimated wind speed was greater than 210 mph. An EF-5 ...