Good morning. Illinois. I'm Aaron Jolly. That thick gray blanket outside your window? It's not going anywhere fast. We're waking up to 33 degrees under stubborn overcast skies. If you're near the Wisconsin border this morning, you're practically driving blind — visibility has dropped to a quarter mile or less in spots. A Dense Fog Advisory sticks around until 10 A.M., so give yourself extra time on the commute. In the next 24 hours. In Here's strange part, step three hours south and it's a different world. Central Illinois is running a solid 31 degrees to 31 degrees warmer than the north. Springfield hits 51 degrees today, while Chicagoland struggles to reach 39. That sharp temperature difference is like striking a match — it triggers showers and thunderstorms this afternoon, mainly along and south of I-70. Keep your eyes on the sky between 2 and  ...