The Brief A Tornado Warning was issued Monday for parts of Chicagoland as severe storms moved through the area. A Tornado Warning was issued for the Chicago area on Monday. TORNADO WARNING TIMELINE EXPANDED. Tornado Warning in Chicago areaWhat we know:The National Weather Service said the Tornado Warning was in effect for parts of Cook, DuPage and Will Counties, including suburbs Wheaton, Orland Park and Lombard until 1:15 p.m. The broader Chicago area is also under a Severe Thunderstorm Warning until 1 p.m. with wind gusts of up to 70 mph.