Severe weather threats loom over chicago region

A potentially active stretch of weather is expected to hit the Chicago area late Tuesday, bringing the risk of severe thunderstorms, damaging winds, large hail, and even a few tornadoes, especially in areas south of the city.

Favorable conditions for severe weather

A surge of warm air will set the stage for a sharp temperature divide across Northern Illinois, with areas closer to Lake Michigan staying cooler and cloudier, while regions to the south remain warm and humid.

The primary window for severe weather is between 4pm and midnight, with the greatest threat mainly south of Chicago along and south of Interstate 80.

Storms in the southern parts of the region could produce damaging winds, large hail, and even a few tornadoes, while farther north, storms are more likely to produce hail and gusty winds without the same tornado risk due to cooler, more stable air near the lake.

Heavy rain is also a concern, especially Tuesday night, as slow-moving storms could repeatedly move over some areas and potentially cause localized flooding.

The entire Chicago area is at a medium risk of tornadoes and flooding, a low to medium risk of wind damage, and a medium to high risk of large hail, with some hail potentially as large as tennis balls.

If a tornado warning is issued for your area, take shelter in the lowest level of your home or a basement if possible. If not, go to an interior room away from windows, like a bathroom, closet, or hallway. If outside, immediately seek shelter in a sturdy building. If in a car, drive to the closest shelter and take cover, or abandon the vehicle and seek shelter in a low-lying area.