A significant storm system is currently impacting the Chicago area, bringing with it the potential for large hail, strong winds, and a slight chance of tornadoes. The National Weather Service (NWS) has issued a Severe Thunderstorm Watch for multiple counties in Illinois, including Ford, Grundy, Kankakee, Will, LaSalle, Livingston, and Iroquois, as well as Jasper, Benton, Lake, Newton, and Porter counties in Indiana. This watch is in effect until 11 p.m.

Additionally, a Severe Thunderstorm Warning has been activated for Benton and Newton counties until 5:45 p.m.

The NWS has identified three primary threats associated with this storm: large hail, damaging winds, and a minimal chance of tornado activity. Hailstones exceeding 2 inches in diameter are possible, with egg-sized hail expected to fall in areas stretching from Chicago to the south. Wind gusts may reach up to 60 miles per hour in the most intense storm cells. The peak risk period is anticipated from 3 p.m. to midnight, particularly south of Interstate 80.

While the risk of tornadoes has decreased due to the rapid movement of the cold front, which has limited the heat and moisture necessary for tornado formation, isolated tornadoes cannot be completely ruled out, especially in Kankakee County and Northwest Indiana until 7 p.m.

Heavy rainfall is also expected, with accumulations of up to 1.5 inches possible, which could result in flooding in low-lying areas and on roadways. Drivers are advised to exercise caution while traveling this evening.

Once the storm system passes, expected by midnight, conditions will change rapidly. Temperatures will begin to drop, and strong north winds gusting over 40 mph will develop throughout the evening, leading to a noticeable chill by Friday morning.

Residents in the affected areas should remain vigilant and monitor updates from the National Weather Service and local emergency management agencies throughout the evening. If severe weather approaches, seek shelter indoors, steer clear of windows, and avoid driving through flooded areas.