A severe thunderstorm warning has expired for portions of Cook and DuPage counties.

Chicago Radar: Track Showers & Storms here

Thunderstorm watch for Boone, DeKalb, Kane, Lake, La Salle, Lee, McHenry and Ogle counties also expired at 7 p.m.

Latest warnings and watches from the National Weather Service.

Sunday night: Mostly cloudy, muggy & chance of showers/thunderstorms, low: 73

Monday: Partly sunny start, PM clouds & chance of showers/thunderstorms, highs near 90

Extended outlook calls for a gusty NW winds to drive humidity and temperatures down into the lower 80 with lots of summer sunshine for Tue/Wed. We start out September with comfortable temperatures and pleasant sunshine with highs in the upper 70s to near 80 for Thu/Fri– and temps head back towards the mid 80s by the start of Labor Day weekend. 

Full forecast details and more at the WGN Weather Center blog