Scattered thunderstorms and locally heavy rains are forecast for the Chicago area over the next few days.
A tornado watch was in effect much of Thursday for western and parts of southern Illinois, pretty much west of a line from Rockford to DeKalb to Pontiac, according to the National Weather Service.
A warm air mass and lots of moisture in the air means scattered, sometimes strong thunderstorms could pop up and move across the area anytime over the next few days, according to WGN/Tribune meteorologist Tom Skilling.
The thunderstorm clusters in coming days could generate some impressive local rainfall totals, with some areas seeing more than 3 inches of rain through Saturday.
For the latest radar, conditions and forecasts go to the Chicago Weather Center.