501 WGUS53 KLSX 182201 FFWLSX MOC071-073-219-190100- /O.NEW.KLSX.FF.W.0019.260518T2201Z-260519T0100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service St Louis MO 501 PM CDT Mon May 18 2026 The National Weather Service in St Louis has issued a * Flash Flood Warning for... Northwestern Franklin County in east central Missouri... Northern Gasconade County in east central Missouri... Warren County in east central Missouri... * Until 800 PM CDT. * At 501 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 2 and 4 inches of rain have fallen. Additional rainfall amounts up to 1 inch 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... Warrenton, Wright City, Hermann, Marthasville, Truesdale, Innsbrook, Treloar, Swiss, Dutzow, Mount Sterling, Foristell, Berger, Holstein and Bay. This includes Interstate 70 in Missouri between exits 188 and 200. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 3858 9164 3871 9142 3885 9142 3884 9127 3887 9127 3888 9111 3887 9096 3854 9096 3856 9101 3861 9107 3859 9113 3862 9123 3865 9123 3844 9164 FLASH FLOOD...RADAR INDICATED $$ Walsh  903 WGUS53 KLSX 182206 FFWLSX ILC027-119-133-163-MOC099-189-510-190200- /O.NEW.KLSX.FF.W.0020.260518T2206Z-260519T0200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service St Louis MO 506 PM CDT Mon May 18 2026 The National Weather Service in St Louis has issued a * Flash Flood Warning for... Western Clinton County in south central Illinois... Southern Madison County in southwestern Illinois... Northwestern Monroe County in southwestern Illinois... Saint Clair County in southwestern Illinois... Northeastern Jefferson County in east central Missouri... Eastern Saint Louis County in east central Missouri... East Central Saint Louis City in east central Missouri... * Until 900 PM CDT. * At 506 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... Belleville, Granite City, O'Fallon, East St. Louis, Collinsville, Edwardsville, Fairview Heights, Cahokia, Swansea, Glen Carbon, Shiloh, Highland, Troy, Waterloo, Columbia, Maryville, Mascoutah, Pontoon Beach and Centreville. This includes the following State Parks... Frank Holten State Park and Horseshoe Lake State Park. This includes the following highways... Interstate 64 in Illinois between exits 9 and 27. Interstate 70 in Illinois between exits 21 and 30. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 3826 9037 3835 9036 3844 9029 3852 9026 3861 9018 3867 9018 3872 9021 3877 9017 3882 8960 3866 8960 3866 8971 3843 8970 3821 9035 FLASH FLOOD...RADAR INDICATED $$ Walsh  481 WGUS53 KLSX 182212 FFWLSX MOC183-189-510-190115- /O.NEW.KLSX.FF.W.0021.260518T2212Z-260519T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service St Louis MO 512 PM CDT Mon May 18 2026 The National Weather Service in St Louis has issued a * Flash Flood Warning for... Saint Charles County in east central Missouri... Saint Louis County in east central Missouri... Saint Louis City in east central Missouri... * Until 815 PM CDT. * At 512 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 0.5 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... St. Louis, O'Fallon, St. Charles, St. Peters, Florissant, Chesterfield, Wildwood, University City, Ballwin, Wentzville, Kirkwood, Maryland Heights, Hazelwood, Webster Groves, Ferguson, Manchester, Creve Coeur and Overland. This includes the following State Parks... Babler Memorial State Park, Scott Joplin Historic Site, Route 66 State Park, Castlewood State Park, Confluence State Park and First Missouri State Capitol Historic Site. This includes the following highways... Interstate 70 in Missouri between exits 203 and 231. Interstate 44 in Missouri between exits 261 and 277. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 3864 9073 3854 9090 3855 9096 3889 9096 3888 9082 3892 9079 3893 9067 3887 9056 3897 9044 3884 9011 3872 9021 3861 9018 3839 9034 3845 9034 3848 9042 3850 9041 3845 9068 3847 9074 FLASH FLOOD...RADAR INDICATED $$ Walsh