Illinois, Missouri Severe Thunderstorm Warning | Effective 05/18/2026 04:28

Headline: 
Severe Thunderstorm Warning issued May 18 at 6:28AM CDT until May 18 at 7:00AM CDT by NWS St Louis MO
Event: 
Severe Thunderstorm Warning
Urgency: 
Immediate
Effective: 
May 18, 2026 - 4:28am
Expires: 
May 18, 2026 - 5:00am
Description: 
At 628 AM CDT, a severe thunderstorm was located near Spencerburg, or 12 miles north of Vandalia, moving northeast at 45 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Center, Spencerburg, Frankford, New London, Ilasco, Hannibal, Saverton, Ashburn, Fall Creek, Seehorn, Hull, New Canton, Kinderhook, Payson, Rockport and Plainville. This includes the following State Parks... Fall Creek Scenic Overlook State Natural Area. This includes Interstate 72 between exits 4 and 10.
Instruction: 
Seek shelter inside a well-built structure and stay away from windows. This storm is capable of producing damaging winds. 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: 
Adams, IL; Pike, IL; Marion, MO; Pike, MO; Ralls, MO
Forcast Office: 
NWS St Louis MO