Alert archive / Iowa / Flash Flood Warnings in 2026
Flash Flood Warning 29, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Sep 8, 2026, 6:29 PM CDT for Dallas County, Polk County, Iowa. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 8, 2026, 6:29 PM CDT (23:29 UTC)
- Expired
- Sep 9, 2026, 12:30 AM CDT
- In force
- 6 hr
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Dallas County, IA, Polk County, IA
The radar
The Des Moines radar (KDMX), 9 km from the middle of the area, began a volume at 23:29 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Des Moines, IA wrote its last area forecast discussion before this flash flood warning went out at Sep 8, 2:27 PM CDT, 4 hours 2 minutes earlier.
Area forecast discussion, Sep 8, 2:27 PM CDT, 4 hours 2 minutes before
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</html>Hazardous weather outlook, Sep 8, 1:54 PM CDT, 4 hours 35 minutes before
Hazardous Weather Outlook National Weather Service Des Moines IA 154 PM CDT Tue Sep 8 2026 IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075- 081>086-092>097-091500- Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo- Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun- Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-Greene- Boone-Story-Marshall-Tama-Audubon-Guthrie-Dallas-Polk-Jasper- Poweshiek-Cass-Adair-Madison-Warren-Marion-Mahaska-Adams-Union- Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur-Wayne- Appanoose-Davis- 154 PM CDT Tue Sep 8 2026 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...This afternoon and tonight The Heat Index will hover near or just over 100 degrees across much of southern Iowa late this afternoon and early evening before diminishing. Showers and thunderstorms will become more widespread across much of the area by this evening and into tonight, then be located mostly over southern Iowa by sunrise Wednesday. A few of the storms may be severe this evening, with damaging winds the primary threat but also hail and even an isolated tornado remaining possible. Locally heavy rainfall could also lead to flooding in some areas from this evening through tonight. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Thunderstorm chances return to the forecast from late Friday through the weekend. Any severe weather potential during this time will be assessed in the coming days. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed later today. && NWS Des Moines will discontinue the Hazardous Weather Outlook product (HWO) on September 30th, 2026. Weather hazards and outlooks will continue to be provided through the standard forecast channels, including weather briefing packets, forecast discussions, weather story graphics, the experimental graphical hazardous weather outlook, and updated hazard messaging. All local products and visual tools are accessible directly at weather.gov/desmoines. Lee
In the hours before
Local storm report, Sep 8, 5:54 PM CDT, 35 minutes before
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</html>Local storm report, Sep 8, 6:08 PM CDT, 21 minutes before
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</html>The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 8, 5:50 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Jasper, Marshall, Polk, Story | 40 min |
| Sep 8, 6:21 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Mahaska, Marion, Polk, Poweshiek, Warren | 39 min |
| Sep 8, 6:55 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Lucas, Mahaska, Marion, Monroe, Polk and 2 more | 50 min |
Nearby
Flash Flood Warnings in Iowa, 2026Every flash flood warning in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.