⚠️ Flash Flood Warning – Boone, IA; Dallas, IA; Hamilton, IA; Jasper, IA; Polk, IA; Story, IA; Webster, IA – Saturday, July 4, 2026

Flash Flood Warning issued July 4 at 2:26AM CDT until July 4 at 8:30AM CDT by NWS Des Moines IA

Details

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.

Instructions

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.

This alert was automatically posted by SkyGuard, MWSC’s severe weather alerting system. Source: National Weather Service.