The Lilianstrom family of Streamwood was at the Chicagoland Speedway in Joliet as Thursday's squall line moved in around 7:30 p.m. Al Lilianstrom took this photograph and shares it with us. Many thanks Al -- great shots!
--Tom Skilling, Chief Meteorologist, WGN-TV/Chicago Tribune
Photo courtesy of Al Lilianstrom of Streamwood
