Illinois Dense Fog Advisory | Effective 04/17/2026 06:24

Headline: 
Dense Fog Advisory issued April 17 at 8:24AM CDT until April 17 at 10:00AM CDT by NWS Chicago IL
Event: 
Dense Fog Advisory
Urgency: 
Expected
Effective: 
April 17, 2026 - 6:24am
Expires: 
April 17, 2026 - 8:00am
Description: 
* WHAT...Visibility one quarter to one half mile in dense fog, especially near the lake shore. * WHERE...Lake IL and McHenry Counties. * WHEN...Until 10 AM CDT this morning. * 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: 
McHenry; Lake
Forcast Office: 
NWS Chicago IL
Sender: 
w-nws.webmaster@noaa.gov