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 ...

The National Weather Service said the EF5 twister in North Dakota packed winds stronger than 200 mph, underscoring risks that climate change brings.

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 ...