EF1 tornado in Cook County, Illinois

A tornado with estimated peak winds of 95 mph touched down just south of Interstate 290 near Francisco Avenue and moved east, until it turned northeast and crossed Interstate 290 between Damen Avenue and Ashland Avenue. Tree damage occurred along the path of the tornado. Minor roof damage occurred to a building on Flournoy Street. More extensive tree damage including healthy trees uprooted occurred near Rush and Stroger Hospitals. After crossing Interstate 290, the tornado turned east near Skinner Park where the most significant damage occurred. Numerous large healthy trees were uprooted, one falling on a fence. Roof damage occurred to a building in Skinner Park and the Chicago Police Academy building sustained minor fascia damage. The tornado was likely at peak intensity in this area. The tornado continued producing tree damage, crossed Interstate 90/94 and then ended before reaching the Chicago River.

A derecho moved across northern Illinois during the evening of July 15th producing widespread wind damage and 30 tornadoes in northeast Illinois. One of these tornadoes crossed into northwest Indiana. At the height of the storms, 430,000 customers lost power with some power not restored for four days, on July 19th.