Flood Advisory issued May 18 at 8:17PM CDT until May 19 at 8:15AM CDT by NWS St Louis MO
Issue date: 2026-05-19T01:17+00:00
* WHAT...Urban area and small stream flooding caused by excessive rainfall is expected. * WHERE...Marion County in south central Illinois... * WHEN...Until 815 AM CDT Tuesday. * IMPACTS...Minor flooding in low-lying and poor drainage areas. * ADDITIONAL DETAILS... - At 815 PM CDT, emergency management reported heavy flooded roads in the advisory area due to recent thunderstorms. This has caused urban and small stream flooding. Between 3 and 6 inches of rain have fallen. This product replaces the Flash Flood Warning that recently expired. - Several roadways throughout the county are impacted by flood water and will remain closed through tonight. If you approached a flooded roadway, do not drive around barricades or attempt to cross, as only a small amount of water can stall a vehicle. - Some locations that will experience flooding include... Centralia, Salem, Sandoval, Wamac, Central City, Odin, Kinmundy, Patoka, Farina, Omega, Stephen Forbes Station, Fairman, Helm, Tonti, Iuka, Junction City, Alma, Kell, Vernon and Walnut Hill.
Flood Watch issued May 18 at 1:56PM CDT until May 19 at 1:00PM CDT by NWS St Louis MO
Issue date: 2026-05-18T18:56+00:00
* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of south central Illinois, including the following areas, Bond IL, Clinton IL, Fayette IL, Marion IL and Washington IL and Missouri, including the following areas, Boone MO, Callaway MO, Cole MO, Crawford MO, Franklin MO, Gasconade MO, Moniteau MO, Montgomery MO, Osage MO, Warren MO and Washington MO. * WHEN...Through Tuesday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Potential rainfall amounts of 2 to 4 inches, with localized higher amounts of 4 to 6 inches.
