EF1 tornado in Winnebago County, Illinois

An EF-1 tornado began near the intersection of Freeport Road and Bates Road southeast of Harrison, initially downing several tree branches at and near a small cemetery. The tornado produced additional tree damage as it tracked eastward along Roscoe Road before entering the west side of Roscoe and reaching its peak intensity as it tracked through the Hawks Point, Crystal Hills, and Oxford Commons subdivisions. There, multiple homes had portions of their roofs torn off or damaged and had sections of siding and fascia peeled off. A few homes also had their garage doors blown in, leading to parts of their garage walls getting blown out in a few cases. Numerous trees were also uprooted or damaged in these subdivisions. The tornado then continued eastward, knocking down several power poles along Gleasman Road and damaging a nearby farm outbuilding before crossing the Rock River. East of the Rock River, the tornado continued to cause extensive tree damage. Multiple additional houses sustained roof and fascia damage from the tornado as well. The tornado appeared to dissipate just as it reached the Winnebago-Boone County line. Extensive straight-line wind damage was also observed in close proximity to the tornadic circulation, particularly along its southern flank.

A line of severe thunderstorms moved across all of northern Illinois during the evening of April 17th producing several tornadoes and wind damage. Large hail occurred across parts of northwest Illinois and flooding occurred across parts of northeast Illinois.