May 20, 2013, marks the last time the United States was hit by the worst type of tornado. On that date, a monster EF5 tornado tore a 17-mile path through the Oklahoma City suburbs, creating "40 ...

The map below shows the approximate tracks of ... rated EF5 since the switch to the Enhanced Fujita Scale): Just 59 F5/EF5 tornadoes have been reported nationwide since 1950, meaning Texas ...

Tornado strength is categorized by the Enhanced Fujita (EF) scale, ranging from EF0 (weakest) to EF5 (strongest), according to the National Weather Service. View of the 'rope' or decay stage of ...

MOLINE, Ill. — A new study published by the American Meteorological Society has shed light on a puzzling phenomenon: The United States has not logged an EF5 tornado, the most violent category ...

Twelve years ago, the last EF5 tornado to hit the United States tore through Moore, Oklahoma. The violent storm carved a path of destruction through neighborhoods, killing 24 people and injuring ...