Violent thunderstorms have started to develop in eastern Iowa and northern Illinois and will track eastward through Wednesday night.
"Thunderstorms capable of threatening lives and property will target parts of Iowa, Illinois, southern Wisconsin, Indiana, Ohio, Kentucky, West Virginia and western Pennsylvania on Wednesday and Wednesday night," AccuWeather Senior Meteorologist Kristina Pydynowski said.
As a result, the storms could lead to travel delays, property damage and power outages particularly around Chicago, Indianapolis, Detroit, Cincinnati and Pittsburgh.
People in these areas should take cover as storms approach as they will be capable of producing wind over 70 mph, hail as large as baseballs and damaging tornadoes.
UPDATES: (All times are listed in Central Daylight Time)
7:23 p.m. CDT Wednesday: An NWS spotter reported a brief tornado touchdown near Amboy, Illinois, around 7:12 p.m.
7:04 p.m. CDT Wednesday: Extreme meteorologist Reed Timmer reports a funnel cloud near Dixon, Illinois:
RT @reedtimmerTVN: NEW: funnel cloud with monster supercell south of Dixon, IL!!! Needs tornado warning @NWSChicago pic.twitter.com/UXJYX8D2su— AccuWeather.com (@breakingweather) June 22, 2016
6:45 p.m. CDT Wednesday: Skies are darkening near Prophetstown, Illinois:
@allen795 @metwxpatrick @wxmet near Prophetstown, IL #ilwx pic.twitter.com/qnA2f113AJ— Matthew Lewis (@mlewiswx11) June 22, 2016
5:00 p.m. CDT Wednesday: Severe thunderstorms are likely to affect Chicago between 7 p.m. and 11 p.m. tonight.
Approximate timing for severe threat. We adjusted timing slightly later, but no big changes w/thoughts. #ilwx #inwx pic.twitter.com/e0XdncBqGq— NWS Chicago (@NWSChicago) June 22, 2016