EF0 tornado in Cook County, Illinois

A tornado with estimated peak winds of 85 mph touched down near Harlem Avenue and 135th Street and moved nearly due east, paralleling 135th Street. Numerous tree limbs were blown down along trails in a forest preserve south of 135th Street. Significant tree damage occurred near 135th Street and Central Avenue. Minor roof damage to a home and a large uprooted tree occurred near Laramie Avenue. Tree damage occurred during the rest of the path of the tornado, which crossed Interstate 294 and then ended near Mozart Street and 135th 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.