CHICAGO, Illinois, June 25, 2026 – A fresh round of severe weather swept through the Chicago metropolitan area on Thursday, prompting a series of severe thunderstorm warnings and grounding flights at O’Hare International Airport. The storms, packing threats of damaging winds and hail, arrived just a day after a powerful system triggered tornado warnings in the region, leaving residents on high alert.
New Warnings and Immediate Threats
On Thursday afternoon and evening, the National Weather Service (NWS) Chicago issued multiple warnings for Cook, Will, DuPage, and Grundy counties. By early evening, severe thunderstorm warnings were in effect for suburbs including Naperville, Bolingbrook, Orland Park, and Tinley Park, with forecasters warning of wind gusts up to 60-70 mph.
The storm cells, moving swiftly across the region, brought a renewed threat of:
- Damaging Winds: Gusts capable of downing tree limbs and causing power outages. Large Hail: Reports of quarter-sized hail were monitored as the system pushed eastward. Heavy Downpours: Torrential rain accompanied the squall line, reducing visibility for evening commuters.
Earlier in the day, the Storm Prediction Center had placed the area under a “Marginal Risk” (Level 1 of 5) for severe weather, highlighting isolated damaging winds as the primary hazard for Thursday evening.
Travel Disruptions
The active weather pattern caused significant disruptions at O’Hare International Airport, where a ground stop was issued Thursday evening due to the approaching thunderstorms. Travellers faced delays as airlines paused departures to ensure safety on the tarmac.
A Volatile Week for Chicago Weather
Thursday’s storms struck a region already weary from a week of volatile weather. Just 24 hours prior, on the evening of Wednesday, June 24, a more intense line of storms triggered tornado warnings for parts of Kane and Cook counties.
- Wednesday’s Damage: The previous night’s system produced wind gusts of nearly 70 mph and dropped quarter-sized hail. Significant tree damage was reported in the north-west suburb of Bartlett, where 3-inch tree limbs were snapped by the gale. Flooding: A flood advisory had also been issued for Cook, DuPage, and Will counties late Wednesday, as the ground remained saturated from repeated downpours.
Looking Ahead: Heat Wave on the Horizon
As the storm system exits the region late Thursday night, the weather pattern is expected to shift dramatically. Forecasts indicate a transition to a hotter and drier pattern heading into the weekend.
- Friday & Saturday: Conditions are expected to stabilise, though humidity will remain noticeable.
- Sunday & Monday: A significant warm-up is predicted, with high temperatures climbing into the mid-90s and heat index values potentially reaching 105°F by Sunday.
Authorities continue to urge residents to monitor local forecasts and remain “weather aware” as clean-up efforts from the week’s multiple storm rounds continue.
