CHICAGO, Ill. — Strong to severe thunderstorms could develop across parts of Illinois Tuesday afternoon and continue into Tuesday night, bringing the risk of hail, damaging winds, and possible tornadoes.
According to the National Weather Service Chicago office, an active weather pattern is expected to return to the region Tuesday as warmer air moves north ahead of an approaching storm system.
Forecasters say the greatest severe weather risk may develop during the late afternoon and evening hours Tuesday, particularly across central Illinois and areas south of Interstate 80.
Potential hazards include large hail, damaging wind gusts, and isolated tornadoes, along with periods of heavy rainfall that could lead to localized flash flooding in some communities.
The exact location of the strongest storms remains uncertain. Meteorologists say the northward position of a warm front will play a key role in determining where the most intense storms develop.
Areas north of the boundary may primarily see hail-producing storms, while locations farther south could experience the full range of severe weather hazards.
Ahead of the storm system, Illinois is expected to see spring-like warmth Monday and Tuesday, with temperatures climbing into the upper 60s and 70s in some areas before storms arrive.
Following the system, significantly cooler air is expected to move into the region Wednesday, with highs falling into the 40s and 50s.
Residents are encouraged to monitor forecast updates as the system approaches and be prepared for possible severe weather Tuesday evening.
The timing could affect evening commuters and students traveling home as storms develop later in the day.
