CHICAGO — Patchy dense fog with mostly sunny conditions Friday and cooler lakeside. Winds: E 5-10. High: 75/72.

Dense Fog Advisory until 9 a.m. for: McHenry, Kane, DuPage, DeKalb, LaSalle, Kendall, Grundy, Will, Kankakee, Jasper counties.

Mostly clear tonight with calm conditions. Winds: E 0-5. Low: 59.

Saturday Forecast: Mostly sunny, cooler lakeside, SSE 0-5. High: 82/77.

Full forecast details and more at the WGN Weather Center blog