Severe weather threatens with large hail and damaging winds across multiple counties.
Category: Science
A severe thunderstorm watch has been issued for parts of the Chicago area, including counties across Illinois and Indiana, due to an impending weather threat. The National Weather Service (NWS) has warned that the watch is effective for LaSalle, Grundy, Will, and Kankakee counties, along with Lake, Porter, LaPorte, Newton, and Jasper counties until late Thursday night.
The primary threats from these storms include large hail exceeding two inches and damaging wind gusts reaching up to 65 miles per hour. The NWS has also noted a limited risk of flooding occurring well south of Interstate 80, particularly where heavy downpours are expected.
According to meteorological forecasts, peak tornado intensity could produce winds between 100 to 130 miles per hour. Parts of the Chicago area are currently at an “enhanced” risk for severe storms, a classification that indicates a higher likelihood of severe weather.
On Thursday, March 26, 2026, the cold front pushing toward the area has resulted not only a drop-in temperatures across Chicago but has also maintained warm and humid conditions south of Interstate 80 and across northern Indiana. These conditions are conducive to the formation of strong-to-severe thunderstorms, including supercells capable of producing gusty winds, tornadoes, and very large hail.
Severe storm warnings have also been issued for Benton and Newton counties until 5:45 p.m. local time, with the NWS predicting that the most intense storms may occur between 3 p.m. and midnight. Meteorologists have indicated that the greatest risk for severe storms lies south of Interstate 80, where egg-sized hail and winds up to 60 miles per hour are possible.
Heavy rainfall, with totals potentially reaching 1.5 inches, could exacerbate flooding issues, particularly affecting low-lying areas and roads. Following the cold front's passage, a notable temperature drop is expected, with strong north winds gusting over 40 mph contributing to a blustery Friday.
Travelers at O'Hare International Airport have experienced delays averaging over 90 minutes due to the severe weather, though a ground stop has since been lifted. The NWS has advised residents to stay tuned for updates, emphasizing the importance of being prepared for rapidly changing weather conditions.
With the storm system expected to exit the area by midnight, residents are urged to monitor weather updates and take necessary precautions. The severe thunderstorm watch serves not only to inform but to encourage readiness for potentially dangerous weather.
For those living or traveling through the affected areas, it's a good time to check emergency supplies, secure outdoor items, and stay informed through local weather services. The National Weather Service continues to monitor the situation closely and will provide updates on any changes to the weather forecast.
Stay safe and be prepared for severe weather conditions this evening!