A deadly tornado in Enderlin, North Dakota, on June 20 has been upgraded to an EF5, marking the first EF5 tornado in the United States 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 (322 kph), the strongest classification of tornado and the first confirmed on American soil in a dozen years, meteorologists said ...

The Enderlin tornado on June 20 was classified as an EF-5 with estimated winds up to 266 mph, making it one of the strongest tornadoes in U.S. history.

(Reuters) - A succession of tornadoes ripped through Alabama's Lee County on Sunday with winds of 150 miles per hour (241 kph), killing at least 23 people including children in the deadliest such storms to strike the United States in almost six years.

Most of the fatalities were in hard-hit Kentucky. The devastating twisters that tore through the South and the Midwest last weekend marked the deadliest tornado outbreak in the U.S. in a decade. Here's a closer look at the tornadoes by the numbers: At ...

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 American soil in a dozen years, meteorologists said Monday.