Good afternoon. Illinois. I'm Aaron Jolly. Folks, there's a quiet cold sitting over Illinois right now. A big high pressure system parked over the Upper Midwest is pumping Canadian air straight down into our laps. That 26 degrees on your thermometer this morning? That's why. In the next 24 hours. But this calm doesn't last. A disturbance sliding in from the Great Basin flips the script tonight. and central Illinois. You're in the crosshairs. Let me walk you through it. Up north, you've got the easiest day in the state. Mostly sunny skies, highs near 35 degrees. Enjoy it. Tonight stays clear with lows around 21. Chicago, that northeast wind off Lake Michigan is doing its thing. Ten to 15 miles an hour, holding you to about 30 degrees. Feels closer to 18 with that damp chill cutting through your coat. Clouds roll in tonight. Lows settle near 29.  ...