CHICAGO ( WGN ) — Monday marks the 58th anniversary of Northern Illinois’ worst tornado outbreaks.
On April 21, 1967 , at least 10 tornadoes, including three powerful F-4 twisters, raked across Belvidere, Lake Zurich and Oak Lawn, killing nearly 60 people and injuring more than 1,000 others.
The damage, in 1967 dollars, exceeded $100 million…