Illinois Severe Severe Thunderstorm Warning | Effective 07/20/2026 18:42

Headline: 
Severe Thunderstorm Warning issued July 20 at 8:42PM CDT until July 20 at 9:15PM CDT by NWS St Louis MO
Event: 
Severe Thunderstorm Warning
Urgency: 
Immediate
Effective: 
July 20, 2026 - 6:42pm
Expires: 
July 20, 2026 - 7:15pm
Description: 
At 842 PM CDT, a severe thunderstorm was located 10 miles northeast of Clayton, or 23 miles northeast of Quincy Regional Airport, moving southeast at 55 mph. HAZARD...70 mph wind gusts and small hail. SOURCE...Radar indicated. IMPACT...Expect considerable tree damage. Damage is likely to mobile homes, roofs, and outbuildings. Locations impacted include... Lima, Woodville, Loraine, Mendon, La Prairie, Coatsburg, Golden, Camp Point, Columbus, Quincy Regional Airport, Burton, Clayton, Adams, Liberty, Mound Station, Mount Sterling, Buckhorn, Ripley, Versailles and La Grange. This includes the following State Parks... Siloam Springs State Park.
Instruction: 
Anyone outdoors should move to shelter inside a well-built structure and stay away from windows. This storm is capable of producing widespread damaging winds.
Area Description: 
Adams, IL; Brown, IL
Forcast Office: 
NWS St Louis MO