Major Flood
1394.5 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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This is an NWS forecast point (LID: MLSI4). Live data may be limited. View on NWS AHPS →
FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
1393 ft
Minor Flood
1391 ft
Action Stage
1390 ft
What Floods at Each Level
1397 ft
The bridge on 140th Street west of Montgomery is overtopped.
1396.5 ft
140th Street west of Montgomery begins to flood as does 130th west of the bridge at the gage.
1395 ft
190th Avenue south of the MN/IA State Line begins to flood, and the bridge on 170th Avenue north of Highway 9 is overtopped. Water also reaches the bottom of the bridge on 120th Street west of Montgomery.
1394.5 ft
Highway 9 east of the Little Sioux River bridge is flooded in two lower spots.
1393.5 ft
170th Ave north of Highway 9 begins to flood as does 170th Ave near 160th St.
1393 ft
Water begins to flood 190th Avenue north of 120th st.
1391 ft
Crop and pasture land begin to flood.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Jun 22, 2024 | 1395.88 ft | — |
| Jun 23, 2018 | 1394.9 ft | — |
| Mar 15, 2019 | 1394.32 ft | — |
About This Gauge
NWS LID
MLSI4
River
Little Sioux River
County
Dickinson, IA
Coordinates
43.4595°N, 95.2308°W
Get Flood Alerts for Little Sioux River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Little Sioux River near Montgomery?
The Little Sioux River near Montgomery gauge is maintained by USGS and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Little Sioux River near Montgomery?
The NWS-defined flood stage for Little Sioux River near Montgomery is 1391 feet. Action stage begins at 1390 feet. Moderate flooding starts at 1393 feet, and major flooding at 1394.5 feet.
How do I get alerts when Little Sioux River rises?
Download StormCast free on Google Play, go to River Gauges, and add Little Sioux River near Montgomery to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Little Sioux River near Montgomery gauge located?
The gauge is located in Dickinson County, Iowa at coordinates 43.4595°N, 95.2308°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Little Sioux River
On This River
Downstream: Little Sioux River near Milford
More Resources
Source & Notes
Data provided by: Observations courtesy of Iowa Flood Center
- No forecasts are available for this location
- Gauge reading may be affected by ice.