Checking the Tornado History Project, there was only one tornado listed for this date in Illinois. It was a pretty big one: an F4 which touched down at 7:20 PM near Atlanta, IL and ran northeast over seven miles along I-55; luckily no lives were lost and only two injuries.
As a kid I could often hear my parents watching TV in the other room while I was in bed. I remember hearing the music at 2:25. Was that the "news theme" that Channel 9 news used since this aired on channel 9?