Las Vegas Sun

EF5 tornadoes — the most powerful classification — rarely occur

Meteorologists said this week that a deadly tornado in North Dakota this summer has been upgraded to a top-of-the-scale EF5, and was the first on American soil in 12 years.

EF5 vs. F5: Abilene meteorologists explain how tornado ratings evolved

Some might think the Enhanced Fujita (EF) Scale is basically the same as the original Fujita (F) Scale, but Big Country ...

First EF5 tornado to strike the US in over a decade just confirmed by experts

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

Deadly North Dakota tornado upgraded to EF5, the first in US in 12 years

A tornado that killed three people in Enderlin, North Dakota, has been upgraded to an EF5 tornado. This is the first EF5 tornado in the United States in about 12 years. The tornado flipped rail cars, ...

EF5 tornado that killed 3 in North Dakota was the nation’s first in 12 years

The last recorded EF5 tornado was on May 20, 2013, in a town outside Oklahoma City, killing 24 people and injuring more than 200 others. That tornado tore through hundreds of homes, a school, hospital ...
WGAL

EF5 tornado that killed 3 in North Dakota was the nation's first 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, the strongest classification of tornado and the first confirmed on ...