094 WGUS53 KFSD 170209 FFWFSD IAC141-143-167-170445- /O.NEW.KFSD.FF.W.0025.250917T0209Z-250917T0445Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Sioux Falls SD 909 PM CDT Tue Sep 16 2025 The National Weather Service in Sioux Falls has issued a * Flash Flood Warning for... Northwestern O'Brien County in northwestern Iowa... Southwestern Osceola County in northwestern Iowa... East Central Sioux County in northwestern Iowa... * Until 1145 PM CDT. * At 909 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Up to 2 inches of rain have fallen. The expected rainfall rate is 1 to 3 inches in 1 hour. Additional rainfall amounts up to 3 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar. 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... Sheldon, Sanborn, Ashton, Melvin and Archer. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 4316 9589 4324 9588 4331 9581 4334 9574 4334 9563 4326 9557 4317 9564 4314 9566 4313 9567 4309 9571 4305 9576 4305 9585 4310 9588 FLASH FLOOD...RADAR INDICATED EXPECTED RAINFALL RATE...1-3 INCHES IN 1 HOUR $$ IG