Summary
ROANOKE -- A tornado that roared through the Roanoke area Tuesday produced winds that may have topped 200 mph, investigators from the National Weather Service in Lincoln said Wednesday.
Weather service meteorologists gave the twister a preliminary rating of "F3 or greater" on the Fujita Scale, which measures tornado strength, said meteorologist Brad Churchill.See the full content of this document
Extract
Tornado Rated 'F3 or Greater'
An F3 tornado produces winds from 158 mph to 206 mph.
Fewer than one in 10 tornadoes that strike Illinois are F3 or stronger, according to Jim A...See the full content of this document
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