Illinois Severe Severe Thunderstorm Warning | Effective 08/11/2026 08:59

Headline: 
Severe Thunderstorm Warning issued August 11 at 10:59AM CDT until August 11 at 11:15AM CDT by NWS Chicago IL
Event: 
Severe Thunderstorm Warning
Urgency: 
Immediate
Effective: 
August 11, 2026 - 8:59am
Expires: 
August 11, 2026 - 9:15am
Description: 
At 1058 AM CDT, severe thunderstorms were located along a line extending from Lake View to near St. John to near Momence, moving east at 70 mph. This line has a history of producing extensive wind damage. HAZARD...70 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect considerable tree damage. Damage is likely to mobile homes, roofs, and outbuildings. Locations impacted include... Chicago, Joliet, Cicero, Hammond, Bolingbrook, Orland Park, Tinley Park, Oak Lawn, Berwyn, Oak Park, Downers Grove, Elmhurst, Lombard, Romeoville, Calumet City, Addison, Woodridge, Chicago Heights, West Town, Chicago Lawn, Englewood, Austin, South Shore, Roseland, and Midway Airport.
Instruction: 
Remain alert for a possible tornado! Tornadoes can develop quickly from severe thunderstorms. If you spot a tornado go at once into the basement or small central room in a sturdy structure. This is a DANGEROUS SITUATION. These storms are producing widespread wind damage across the southern Chicago metro. SEEK SHELTER NOW inside a sturdy structure and stay away from windows.
Area Description: 
Cook, IL; DuPage, IL; Kankakee, IL; Will, IL
Forcast Office: 
NWS Chicago IL
Sender: 
w-nws.webmaster@noaa.gov