EF1 tornado in Cook County, Illinois

A tornado with estimated peak winds of 90 mph touched down in the southwest side of Marquette Park, where several willow trees were snapped near their bases. A concentrated corridor of tree damage continued northeast across the park and golf course. The tornado was likely at peak intensity as it moved through the park. Significant tree damage occurred near 66th Street and Artesian Street where residential streets were blocked due to numerous tree limbs and trees down. At least one light pole was broken. The tornado turned to the east and produced mainly tree damage when it crossed William Ogden Park, where some healthy trees were snapped. The tornado ended just northeast of the park, near May Street and 64th Street.

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.