One man working at a turkey barn was injured. The storm then produced an EF3 tornado, which eventually grew to a width of and reached wind speeds of . At Pickerel Lake, it nearly flattened every tree in the area, while destroying a trailer home, a camper, a garage and a house. At northern sections of Pickerel Lake, one home had its roof torn off and numerous trees were snapped onto other residences and farm buildings. The tornado began to lose its intensity but continued to topple trees, damage storage structures and toss debris before dissipating in Emmaville. A series of impulses moved from the central Rocky Mountains into the central Great Plains. Opulent moisture formed over the Missouri and Mississippi Valleys with dew points reaching near . Strong low level winds over the area created favorable wind shear for supercells. During the afternoon, a supercell developed in western portions of Illinois and moved northeast reaching Lake Michigan around the Illinois-Indiana border in the Chicago metropolitan area, during which it produced eight tornadoes along its path. At 4:21 pm (2121 UTC), an EF0 tornado occurred east of Cornell in Livingston County. The tornado occurred in an open field with no damage observed. At 4:31 pm CDT (2131 UTC), an EF1 tornado touched down southwest of Dwight in Livingston County, snapping power poles and damaging trees and roofs; this tornado lifted at 4:45 pm CDT (2145 UTC). From 5:18 pm CDT (2218 UTC) to 5:46 pm CDT (2246 UTC), an EF2 tornado traveled across southwestern Will County and extreme northwestern Kankakee County, near Wilmington, uprooting trees, damaging homes and destroying sheds. At 5:51 pm CDT (2251 UTC), an EF2 tornado touched down for three minutes in central Will County near Wilton Center, destroying a garage and severely damaging a metal building. From 5:55 pm CDT (2255 UTC) to 6:08 pm CDT (2308 UTC), an EF2 tornado occurred west of Monee, leveling barns, garages, and outbuildings and damaging homes. An EF2 tornado re-formed at 6:13 pm CDT (2313 UTC), injuring six people as it crossed Interstate 57. A storm system moved to the northern and central Great Plains region during the day, as strong winds helped push a moist air mass northward ahead of the system.