⚠️ Flash Flood Warning – Jasper, IA; Polk, IA – Thursday, July 2, 2026

Flash Flood Warning issued July 2 at 11:16PM CDT until July 3 at 5:15AM CDT by NWS Des Moines IA

Details

FFWDMX

The National Weather Service in Des Moines has issued a

* Flash Flood Warning for…
Northwestern Jasper County in central Iowa…
Northern Polk County in central Iowa…

* Until 515 AM CDT.

* At 1116 PM CDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area.
Rainfall varies greatly over northern Polk County into northern
Jasper County. Many areas in Jasper County have received 2 inches
or less of rain while parts of northern Polk County have received
in excess of 5 inches. 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 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…
Ankeny, Johnston, Newton, Bondurant, Polk City, Colfax, Granger,
Baxter, Iowa Speedway, Saylorville Lake, Big Creek Lake, Elkhart,
Alleman, Sheldahl, Mingo, Lambs Grove, Valeria, Newton Municipal
Airport and Big 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.