Illinois Severe Thunderstorm Warning | Effective 04/27/2026 12:13

Headline: 
Severe Thunderstorm Warning issued April 27 at 2:13PM CDT until April 27 at 3:00PM CDT by NWS St Louis MO
Event: 
Severe Thunderstorm Warning
Urgency: 
Immediate
Effective: 
April 27, 2026 - 12:13pm
Expires: 
April 27, 2026 - 1:00pm
Description: 
At 213 PM CDT, a severe thunderstorm was located over Granite City, moving east at 30 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. Locations impacted include... East St. Louis, Granite City, Madison, Venice, Fairmont City, Washington Park, Pontoon Beach, Hartford, Fairview Heights, South Roxana, Roxana, Collinsville, Edwardsville, Caseyville, Maryville, Glen Carbon, Troy, O'Fallon and Lebanon. This includes the following State Parks... Horseshoe Lake State Park. This includes Interstate 55 in Illinois near exit 23.
Instruction: 
Seek shelter inside a well-built structure and stay away from windows. This storm is capable of producing damaging winds and large hail. Tornadoes can develop quickly from severe thunderstorms. Seek shelter immediately in an interior room on the lowest floor of a well-built structure. A Tornado Watch remains in effect until 900 PM CDT Monday for a portion of southwest Illinois.
Area Description: 
Madison, IL; St. Clair, IL
Forcast Office: 
NWS St Louis MO
Sender: 
w-nws.webmaster@noaa.gov