ROCHESTER, Minn. (KTTC) – After Monday’s severe weather threat, a confirmed EF-1 tornado damaged property outside Kenyon ...

FAYETTEVILLE, Ark. (KNWA/KFTA) — April 10, 1929, was the day the only documented F5 tornado occurred in Arkansas. It stretched from southern Batesville to north of Swifton and southern Alicia.

Grazulis believes Worcester was probably an F5, although it is officially ranked as an F4 by SPC. In the early 1970s, Grazulis collected early tornado footage to create the world’s first ...

It's one of the nation's most infamous tornado outbreaks, but it also spurred sorely needed improvements in both severe weather forecasting and safety.

A deadly tornado outbreak ripped through the South and Midwest Wednesday and Thursday, destroying homes and neighborhoods, ...

which rated tornadoes from F0 to F5, based on estimated wind speeds and observed damage. Then, in 2007, the weather service adopted the Enhanced Fujita scale, which better reflected actual storm ...