Iowa Severe Flash Flood Warning | Effective 07/04/2026 00:26

Headline: 
Flash Flood Warning issued July 4 at 2:26AM CDT until July 4 at 8:30AM CDT by NWS Des Moines IA
Event: 
Flash Flood Warning
Urgency: 
Immediate
Effective: 
July 4, 2026 - 12:26am
Expires: 
July 4, 2026 - 6:30am
Description: 
FFWDMX The National Weather Service in Des Moines has issued a * Flash Flood Warning for... Boone County in central Iowa... Northeastern Dallas County in central Iowa... Southwestern Hamilton County in central Iowa... Northwestern Jasper County in central Iowa... Polk County in central Iowa... Southern Story County in central Iowa... Southeastern Webster County in central Iowa... * Until 830 AM CDT Saturday. * At 226 AM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1.5 and 3.5 inches of rain have fallen. Additional rainfall amounts up to 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. 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... Des Moines, Ames, West Des Moines, Ankeny, Urbandale, Johnston, Clive, Altoona, Waukee, Boone, Pleasant Hill, Grimes, Windsor Heights, Bondurant, Polk City, Huxley, Saylorville, Madrid, Mitchellville and Ogden.
Instruction: 
Be especially cautious at night when it is harder to recognize the dangers of flooding. For the latest stream observations and forecasts refer to weather.gov/desmoines/water. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Area Description: 
Boone, IA; Dallas, IA; Hamilton, IA; Jasper, IA; Polk, IA; Story, IA; Webster, IA
Forcast Office: 
NWS Des Moines IA