Monday marks anniversary of deadly 1967 tornado outbreak

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.

WGN Chief Meteorologist Emeritus Tom Skilling wrote of the outbreak and his memory of them in 2017 ahead of the 50th anniversary of the storms.