Illinois Weather Trivia for June 21st
- A widely visible tornado, estimated at F2 intensity, was watched by hundreds of people in Winnebago County. The tornado reportedly "meandered" in the Pecatonica River valley in the northwest part of the county. No deaths or injuries were reported.
- A thunderstorm produced winds of 100 mph in Harrisburg, in southeast Illinois. Hundreds of trees were uprooted or snapped, with some of these trees as much as 5 feet in diameter. A few outbuildings were blown off their foundations. The damage path was from 3/4 to 1 mile wide, and 4 to 5 miles long.
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