Widespread showers, thunderstorms expected
Some Chicago-area locations could end up with 2 inches or more rain in the next 24 to 48 hours, as the center of low pressure crosses the Mississippi River out of Iowa on Wednesday, and passes overhead Wednesday night. The low pressure will slowly ease off to the east Thursday, only to be reinforced by an upper-air disturbance that will likely trigger more showers/ thunderstorms before ending from the west Thursday night.
Friday we will transition into high pressure that looks to dominate over the coming weekend, setting the stage for a rain-free Air and Water Show. Under mostly sunny skies, afternoon temperatures Saturday and Sunday project to reach the middle 80s well inland, peaking more in the lower 80s along the lakefront.