Illinois Flash Flood Warning | Effective 05/18/2026 12:11

Headline: 
Flash Flood Warning issued May 18 at 2:11PM CDT until May 18 at 8:15PM CDT by NWS St Louis MO
Event: 
Flash Flood Warning
Urgency: 
Immediate
Effective: 
May 18, 2026 - 12:11pm
Expires: 
May 18, 2026 - 6:15pm
Description: 
FFWLSX The National Weather Service in St Louis has issued a * Flash Flood Warning for... Eastern Clinton County in south central Illinois... Southern Fayette County in south central Illinois... Marion County in south central Illinois... * Until 815 PM CDT Monday. * At 211 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 2 inches of rain have fallen. Additional rainfall amounts of 1 to 2 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar indicated. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. * Some locations that will experience flash flooding include... Centralia, Salem, Sandoval, Wamac, Central City, Odin, Kinmundy, Patoka, Farina, Omega, Stephen Forbes Station, Fairman, Shobonier, Helm, Tonti, La Clede, Iuka, Junction City, St. Peter and Alma. This includes the following State Parks... Stephen A. Forbes State Recreation Area. This includes Interstate 57 in Illinois between exits 109 and 135.
Instruction: 
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Area Description: 
Clinton, IL; Fayette, IL; Marion, IL
Forcast Office: 
NWS St Louis MO
Sender: 
w-nws.webmaster@noaa.gov