Tornadoes are rated from F0 to F5 on the Fujita scale, based on wind speed and damage. The scale was developed by Theodore Fujita of the University of Chicago. - F0: Light damage, wind under 73 mph.

SEATTLE - If you've ever seen stores about tornadoes, you've probably heard them referred to something like an "F1" or "F3". Much like hurricanes are rated on a scale of 1-5, tornadoes are rated on ...

Fairfield County only have been hit with F0 and F1 tornadoes One of Ohio's deadliest tornadoes was about an hour and a half away from Lancaster LANCASTER — The Midwest is over a month into tornado ...

Most tornadoes form where cold, dry air meets warm, moist air. The moist air is lifted rapidly, and strong winds combine to form a spinning column of air that reaches from a thunderstorm down to the ...

One state's earliest known most violent tornado carved through a town, including a college campus in an era decades before the first tornado warning was issued. On June 17, 1882, 143 years ago today, ...