Dense Fog Advisory 03/05/2026 06:59 Illinois

Headline: 
Dense Fog Advisory issued March 5 at 8:59AM CST until March 5 at 12:00PM CST by NWS Chicago IL
Event: 
Dense Fog Advisory
Urgency: 
Expected
Effective: 
March 5, 2026 - 6:59am
Expires: 
March 5, 2026 - 10:00am
Description: 
* WHAT...Visibility of one quarter mile or less in dense fog expected. * WHERE...Boone, De Kalb, Winnebago, Eastern Will, Kane, Kendall, McHenry, and Northern Will Counties. * WHEN...Until noon CST today. * IMPACTS...Low visibility could make driving conditions hazardous.
Instruction: 
If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Area Description: 
Winnebago; Boone; McHenry; De Kalb; Kane; Kendall; Northern Will; Eastern Will
Forcast Office: 
NWS Chicago IL
Sender: 
w-nws.webmaster@noaa.gov