Updated August 10, 2026 at 3:12 p.m.
Central Illinois residents should be prepared for the risk of severe storms starting later this evening and lasting until Tuesday. Flooding and strong winds are possible, according to the National Weather Service. The beginning of the week is also expected to be hot and humid with temperatures as high as 99 degrees.
Widespread heat index around 105 degrees is expected, though this will be dependent on thunderstorms and associated cloud cover. Outdoor activities would be best done in the early morning or the evening hours. #ILwx pic.twitter.com/tI5LSiIKaH
— NWS Lincoln IL (@NWSLincolnIL) August 10, 2026
The midday outlooks from @NWSSPC have introduced a level 3 severe weather risk for Tuesday over much of northern IL. There is some question as to how far south these initial storms make it (I-74 corridor is plausible), though additional PM storms are likely in central IL. #ILwx pic.twitter.com/1ieBmLYPhH
— NWS Lincoln IL (@NWSLincolnIL) August 10, 2026
Seasonally hot and humid weather sticks around through midweek with peak heat indices between 100-105° each afternoon. Protect yourself from the heat by staying hydrated and limiting time outdoors. #ILwx pic.twitter.com/6RqggVZiHl
— NWS Lincoln IL (@NWSLincolnIL) August 10, 2026
Several rounds of storms will move through northern and central IL this week, posing a threat for severe weather. Primary hazards within any storms will be damaging winds gusts and heavy rain, though isolated large hail and a few tornadoes cannot be ruled out. #ILwx pic.twitter.com/aT2HMSXiR0
— NWS Lincoln IL (@NWSLincolnIL) August 10, 2026