Dense Fog Advisory 03/03/2026 23:39 Illinois

Headline: 
Dense Fog Advisory issued March 4 at 1:39AM CST until March 4 at 9:00AM CST by NWS Chicago IL
Event: 
Dense Fog Advisory
Urgency: 
Expected
Effective: 
March 3, 2026 - 11:39pm
Expires: 
March 4, 2026 - 7:00am
Description: 
* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...DuPage, Kane, Lake IL, McHenry, and Northern Cook Counties. * WHEN...Until 9 AM CST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Patchy slick spots may develop on untreated elevated surfaces where temperatures are at or below freezing.
Instruction: 
If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Area Description: 
McHenry; Lake; Kane; DuPage; Northern Cook
Forcast Office: 
NWS Chicago IL
Sender: 
w-nws.webmaster@noaa.gov