Flood Warning — Polk County, Iowa
Flooding is occurring or imminent along rivers, streams, or low-lying areas.
Current Status
🌊 Active: Flood Warning
Flood Warning issued August 16 at 10:54AM CDT by NWS Des Moines IA
...The National Weather Service in Des Moines IA has issued a Flood Warning for the following rivers in Iowa... North River near Norwalk Hwy R57 affecting Polk and Warren Counties. * WHAT...Minor flooding is occurring. * WHERE...The North River near Norwalk Hwy R57, or from the Madison-Warren County line to the Des Moines River. * WHEN...From this morning until further notice. * IMPACTS...At 22.0 feet, Water is over Iowa 28 immediately south of Norwalk and threatens several rural gravel roads. * ADDITIONAL DETAILS... - At 10 AM CDT Sunday the stage was near 22 feet. - Forecast...The river is expected to crest around 22 feet today. - Flood stage is 22.0 feet.
Effective August 16, 2026 at 11:54 AM ET · Expires August 17, 2026 at 8:00 AM ET
Event Details
Event Type
Flood Warning
Severity
severe
Issued By
NWS Des Moines IA
Expires
August 17, 2026 at 8:00 AM ET
Last Checked
2 minutes ago
What To Do
📋 Official NWS Guidance
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. River forecasts include observed precipitation plus forecast precipitation over the next 24 hours.
Also In Effect For
This same Flood Warning also covers:
Other Active Alerts in Iowa
Flood Warning
Flood Warning
Flood Warning
Flood Warning
Flash Flood Warning
Severe Thunderstorm Warning
Get Flood Warning Alerts for Polk County
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Frequently Asked Questions
What does a Flood Warning mean for Polk County, Iowa?
Flooding is occurring or imminent along rivers, streams, or low-lying areas.
Is this Flood Warning currently active?
Yes — this alert is active as of our last check (2 minutes ago). It's set to expire August 17, 2026 at 8:00 AM ET.
How do I get notified about Flood Warning alerts for Polk County?
Download StormCast free on Google Play and set Polk County, Iowa as one of your monitored locations. StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.
What other areas does this alert cover?
This same Flood Warning is also in effect for Warren County.