Illinois Severe Thunderstorm Warning | Effective 04/27/2026 17:58

Headline: 
Severe Thunderstorm Warning issued April 27 at 7:58PM CDT until April 27 at 8:15PM CDT by NWS St Louis MO
Event: 
Severe Thunderstorm Warning
Urgency: 
Immediate
Effective: 
April 27, 2026 - 5:58pm
Expires: 
April 27, 2026 - 6:15pm
Description: 
At 758 PM CDT, severe thunderstorms were located along a line from over Lebanon to 6 miles north of Red Bud, moving east at 35 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... Belleville, Waterloo, Barr, O'Fallon, Shiloh, Smithton, Marine, Freeburg, Scott AFB, Lebanon, St. Jacob, Hecker, Mascoutah, Summerfield, Highland, New Athens, New Baden, Pierron and Fayetteville. This includes the following highways... Interstate 64 in Illinois between exits 19 and 27. Interstate 70 in Illinois between exits 24 and 30.
Instruction: 
Seek shelter inside a well-built structure and stay away from windows. These storms are 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.
Area Description: 
Madison, IL; Monroe, IL; St. Clair, IL
Forcast Office: 
NWS St Louis MO