Severe Weather Outbreak Through Thursday

Wednesday, severe thunderstorms will ignite along a strong warm front and low pressure system from eastern Iowa, northern/central Illinois and southern Wisconsin into Indiana, southern Lower Michigan and Ohio.  This could affect the Wednesday afternoon/evening commute in Chicago, Milwaukee, Detroit and possibly Cleveland.  Damaging winds, large hail, some tornadoes, and local flash flooding from brief heavy rainfall are all threats.

http://www.weather.com/news/tornado-central/severe-weather-tracker-page