Dense Fog Advisory Issued for Kankakee, Iroquois, Cook, Will, Lake, Porter, Newton, Jasper, Benton Counties
A Special Weather Statement has been issued for dense fog affecting Kankakee, Iroquois, Cook, Will, Lake, Porter, Newton, Jasper, and Benton counties overnight through mid-morning today, September 28, 2026, with drivers advised to increase following distance and use low beam headlights.
A Special Weather Statement has been issued by the National Weather Service (NWS) Chicago IL regarding areas of fog, including locally dense fog, expected to impact portions of northeast Illinois and northwest Indiana overnight through mid-morning today, September 28, 2026.
Residents in Kankakee, Iroquois, Southern Cook, Eastern Will, Lake, Porter, Newton, Jasper, and Benton counties should be prepared for reduced visibility. Where the fog is most dense, visibility could be reduced to one-quarter mile or less. The NWS anticipates the fog will expand in coverage before sunrise.
The Special Weather Statement is effective from September 28, 2026, at 12:17 AM UTC, and is set to expire at 4:00 AM UTC. Drivers encountering dense fog are advised to increase following distance and use low beam headlights.


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