Isolated Thunderstorms Possible Saturday Afternoon

(CBS) -- It will be a warm, humid day for the Chicago area Saturday, with the possibility of isolated thunderstorms in the afternoon.

Saturday's high is 86 degrees, dipping to 68 degrees overnight. The National Weather Service has parts of the Chicago area at marginal risk of severe weather.

Sunday is expected to be a warm, sunny day with a high of 85 degrees.