Illinois Severe Thunderstorm Warning | Effective 04/17/2026 19:40

Headline: 
Severe Thunderstorm Warning issued April 17 at 9:40PM CDT until April 17 at 10:00PM CDT by NWS Chicago IL
Event: 
Severe Thunderstorm Warning
Urgency: 
Immediate
Effective: 
April 17, 2026 - 7:40pm
Expires: 
April 17, 2026 - 8:00pm
Description: 
At 940 PM CDT, severe thunderstorms were located along a line extending from near Inverness to Addison to Downers Grove to near Wilmington, moving east at 50 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. These severe storms will be near... Joliet, Downers Grove, Elmhurst, Addison, Elk Grove Village, Woodridge, Lockport, New Lenox, Homer Glen, and Mokena around 945 PM CDT.
Instruction: 
A Tornado Watch remains in effect until 1100 PM CDT for central and northeastern Illinois. 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. For your protection move to an interior room on the lowest floor of a building.
Area Description: 
DuPage, IL; Grundy, IL; Kane, IL; Kendall, IL; Will, IL
Forcast Office: 
NWS Chicago IL
Sender: 
w-nws.webmaster@noaa.gov