Flash Flood Warning — Plymouth County, Iowa
Flooding is imminent or already occurring. Move to higher ground immediately — never drive through flooded roads.
Current Status
🌊 Active: Flash Flood Warning
Flash Flood Warning issued September 7 at 3:02AM CDT until September 7 at 6:00AM CDT by NWS Sioux Falls SD
FFWFSD The National Weather Service in Sioux Falls has issued a * Flash Flood Warning for... Southeastern Plymouth County in northwestern Iowa... Northeastern Woodbury County in west central Iowa... * Until 600 AM CDT. * At 302 AM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 2 and 3 inches of rain have fallen. The expected rainfall rate is 1 to 2 inches in 1 hour. Additional rainfall amounts of 0.5 to 1.5 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar indicated. 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... Kingsley, Correctionville and Pierson.
Effective September 7, 2026 at 4:02 AM ET · Expires September 7, 2026 at 7:00 AM ET
Event Details
Event Type
Flash Flood Warning
Severity
severe
Issued By
NWS Sioux Falls SD
Expires
September 7, 2026 at 7:00 AM ET
Last Checked
2 minutes ago
What To Do
📋 Official NWS Guidance
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding.
Also In Effect For
This same Flash Flood Warning also covers:
Other Active Alerts in Iowa
Flash Flood Warning
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Get Flash Flood Warning Alerts for Plymouth County
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Frequently Asked Questions
What does a Flash Flood Warning mean for Plymouth County, Iowa?
Flooding is imminent or already occurring. Move to higher ground immediately — never drive through flooded roads.
Is this Flash Flood Warning currently active?
Yes — this alert is active as of our last check (2 minutes ago). It's set to expire September 7, 2026 at 7:00 AM ET.
How do I get notified about Flash Flood Warning alerts for Plymouth County?
Download StormCast free on Google Play and set Plymouth 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 Flash Flood Warning is also in effect for Woodbury County.