⚠️ Flash Flood Warning – Jasper, IA; Marshall, IA; Story, IA – Saturday, July 4, 2026

Flash Flood Warning issued July 4 at 2:18AM CDT until July 4 at 8:15AM CDT by NWS Des Moines IA

Details

FFWDMX

The National Weather Service in Des Moines has issued a

* Flash Flood Warning for…
Jasper County in central Iowa…
Southern Marshall County in central Iowa…
Southeastern Story County in central Iowa…

* Until 815 AM CDT.

* At 218 AM CDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
1.5 and 2.5 inches of rain have fallen. Additional rainfall
amounts of 1.5 to 3 inches are possible in the warned area as more
storms move over the area in the next few hours. Flash flooding is
ongoing or expected to begin shortly.

HAZARD…Flash flooding caused by thunderstorms.

SOURCE…Radar and automated gauges.

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…
Newton, Mitchellville, Colfax, Prairie City, Baxter, Iowa
Speedway, Rock Creek Lake, Kellogg, Gilman, Collins, Rhodes,
Mingo, Laurel, Lambs Grove, Valeria, Newton Municipal Airport,
Prairie City Krohn Airport and Rock Creek State Park.

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.