Heavy rainfall is occurring with the storm, and may lead to flash flooding.
The warning is is in effect in Chicago and the surrounding area until 3:15 p.m. Wednesday.
MORE ON THE WAY: Better thunderstorm chances come Friday and into the weekend.
A chance for severe storms arrives Wednesday afternoon through Wednesday night. Wind will damage siding, roofs and trees. Late morning there are showers and t-storms from Oceana Co.to north of Big Rapids over to Alma and down to Ann Arbor.
Developing storms could move east toward Chicago later in the afternoon and into northwest in by about 8 or 9 p.m. Afternoon heat index values will reach into the middle and upper 90s today.