Illinois, Indiana Dense Fog Advisory | Effective 04/17/2026 04:01

Headline: 
Dense Fog Advisory issued April 17 at 6:01AM CDT until April 17 at 10:00AM CDT by NWS Chicago IL
Event: 
Dense Fog Advisory
Urgency: 
Expected
Effective: 
April 17, 2026 - 4:01am
Expires: 
April 17, 2026 - 8:00am
Description: 
* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Illinois, DuPage, Kane, Lake IL, McHenry, and Northern Cook Counties. In Indiana, Porter County. * 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; Kane; DuPage; Northern Cook; Porter
Forcast Office: 
NWS Chicago IL