National Weather Service United States Department of Commerce

Warm and humid conditions will continue through Wednesday night, with a more mild airmass spilling in from the northwest Thursday into Friday. Heat indices are forecast to surpass 100 degrees across central IL Wednesday, with scattered afternoon storms that may turn severe.
Scattered thunderstorms are forecast to develop tomorrow afternoon across west-central IL, and move east, posing a risk for severe weather - mainly north of a Macomb to Bloomington line where SPC has a level 2 of 5 (slight) risk.