Illinois, Missouri Severe Thunderstorm Warning | Effective 04/17/2026 17:21

Headline: 
Severe Thunderstorm Warning issued April 17 at 7:21PM CDT until April 17 at 8:15PM CDT by NWS St Louis MO
Event: 
Severe Thunderstorm Warning
Urgency: 
Immediate
Effective: 
April 17, 2026 - 5:21pm
Expires: 
April 17, 2026 - 6:15pm
Description: 
SVRLSX The National Weather Service in St Louis has issued a * Severe Thunderstorm Warning for... Southern Adams County in west central Illinois... Brown County in west central Illinois... Pike County in west central Illinois... Eastern Marion County in northeastern Missouri... Northeastern Monroe County in northeastern Missouri... Northwestern Pike County in northeastern Missouri... Ralls County in northeastern Missouri... * Until 815 PM CDT. * At 721 PM CDT, severe thunderstorms were located along a line from 14 miles north of Mount Sterling to near Monroe City, or along a line from 27 miles northeast of Quincy Regional Airport to near Monroe City, moving east at 45 mph. HAZARD...70 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect considerable tree damage. Wind damage is also likely to mobile homes, roofs, and outbuildings. * Locations impacted include... Quincy, Palmyra, Monroe City, Rensselaer, Hannibal, Payson, Fall Creek, Spaulding, Center, Mount Sterling, Buckhorn, New London, Beverly, Frankford, Barry, Griggsville, Pittsfield, Atlas, Louisiana and Pike. This includes the following State Parks... Mark Twain Lake Recreational Area and Siloam Springs State Park. This includes the following highways... Interstate 72 between exits 4 and 35. Interstate 172 between exits 2 and 10.
Instruction: 
Anyone outdoors should move to shelter inside a well-built structure and stay away from windows. These storms are capable of producing widespread 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 1100 PM CDT Friday for portions of west central Illinois and northeast Missouri.
Area Description: 
Adams, IL; Brown, IL; Pike, IL; Marion, MO; Monroe, MO; Pike, MO; Ralls, MO
Forcast Office: 
NWS St Louis MO
Sender: 
w-nws.webmaster@noaa.gov