Severe Flood ● Closed
Flood Warning issued September 16 at 4:46AM CDT until September 17 at 10:41AM CDT by NWS Omaha/Valley NE, United States of America
Loading live data… · Marker positions are approximate; severity is labelled in each popup. Sources: USGS, GDACS, NASA EONET, NOAA/NWS, EMSC.
...The Flood Warning is extended for the following rivers in Iowa...
East Nishnabotna River At Red Oak affecting Montgomery County.
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...East Nishnabotna River at Red Oak.
* WHEN...Until Thursday morning.
* IMPACTS...At 20.0 feet, Lowland flooding begins along the west
bank.
* ADDITIONAL DETAILS...
- At 4:00 AM CDT Wednesday the stage was 20.2 feet.
- Bankfull stage is 18.0 feet.
- Recent Activity...The maximum river stage in the 24 hours ending
at 4:00 AM CDT Wednesday was 20.2 feet.
- Forecast...The river is expected to fall below flood stage late
this afternoon and continue falling to 7.7 feet early Monday
morning.
- Flood stage is 18.0 feet.
- Flood History...This crest compares to a previous crest of 20.3
feet on 05/29/1962.
- http://www.weather.gov/safety/flood
Measurements
| Coordinates | 40.9714, -95.2576 |
|---|---|
| Region | Montgomery, IA |
| Location Precision | polygon |
| Issuing Authority | United States of America — us-noaa-nws-en |
| Cap Urgency | Immediate |
| Cap Certainty | Observed |
| Cap Expires | 2026-09-17T10:45:00-05:00 |
Official source
Warnings courtesy of the issuing national meteorological service, via the WMO Alert Hub.
This is an official warning issued by the authority named above. Follow its instructions and those of your local emergency services.
Severity as published by WMO Alert Hub (national weather services).
View original reportAlso reported by: NWS NWS NWS NWS NWS
This event as JSON · API and licence
Source updated 33 days ago (Sep 16, 2026 09:47 UTC) · we last heard from WMO Alert Hub (national weather services) 46 seconds ago
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Satellite view, before and after
The latest clear Sentinel-2 pass before this event and the earliest one after it.
2 Sep 2026, 14 days before this event. 10.7% cloud across the tile.
5 Oct 2026, 19 days after this event. 0% cloud across the tile.
The white ring marks where the event was reported.
Each image is a preview of a whole Sentinel-2 tile — an area of roughly 110 by 110 km, where one pixel is about 320 metres — not a close-up of the event, which may be a small part of it. "Clear" means under 30% cloud across the entire tile, so the exact place that matters can still be hidden. These are pictures for context, not an assessment of damage.
Contains modified Copernicus Sentinel data 2026, found through the Earth Search catalogue (Element 84) and served from the AWS Open Data Sentinel-2 archive.
Official authorities in United States
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More for United States →What to do
Follow the instructions issued by WMO Alert Hub (national weather services) and your local emergency services. The guidance below is background.
Flood preparation, evacuation decisions, and the dangers of driving or walking through floodwater.
Open Flood Safety Guide →Earlier flood events in United States
Severe and extreme events of the same kind, before this one. Listed for scale, not because they are connected to it.
Nearby & related events
Disclaimer: figures are automatic feeds from the named agencies and may be revised. Do not use this page for life-safety decisions — follow official local emergency services.