CHICAGO — Mostly sunny Thursday with hot conditions and a 30% chance of afternoon/evening thunderstorms. Winds: W 10-15 G30. High: 92.

Mostly clear tonight with early evening thunderstorms. Winds: WNW 5-15 G20. Low: 69.

Friday Forecast: Partly cloudy Friday with a 10% chance of thunderstorms and less humid conditions. Winds: SW 5-15 G20, night thunderstorms likely. High: 89.