National Weather Service United States Department of Commerce

Showers and thunderstorms will continue the rest of the afternoon, in areas near and west of I-55. Some of the storms will produce very heavy rain and may be close to severe limits at times.
While scattered showers and a few thunderstorms will continue into the evening across the Illinois River valley, the main threat for rain and storms will be after midnight into late Saturday morning. After that, the remainder of the weekend will be dry. Temperatures this weekend will be cooler, though still well above early March normals, and highs return to the 70s on Monday.
Not much has changed with the outlook for severe weather tonight. While some stronger storms can't be ruled out near the Illinois River this evening, the main severe weather threat will be well after midnight, as a line of storms moves east into the state. This line will be on a weakening trend as it reaches the Indiana border toward daybreak. Scattered wind gusts over 60 mph are the main concern.