Little Sioux River at Linn Grove
Iowa — Water Level & Flood Stage
Located in Buena Vista County, Iowa on the Little Sioux River. Live water level data from USGS gauge 06605850, updated every 15 minutes.
Current Water Level
Gage Height
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Streamflow
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Last Reading
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Flood Stages
Major Flood
22.5 ft
Moderate Flood
20 ft
Minor Flood
16.5 ft
Action Stage
14 ft
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
What Floods at Each Level
31.5 ft
Weaver St is flooded in Linn Grove.
29 ft
Significant flooding is ongoing in Sioux Rapids as water reaches as far in as 2nd and Main St. Water also reaches the bottom of the bridge on Weaver St in Linn Grove.
28 ft
Highway 71 south of the bridge in Sioux Rapids is flooded and at least one house in Linn Grove near the campground may flood.
27 ft
The bathroom at the campground in Linn Grove floods.
24 ft
Some businesses west of Hwy 71 in Sioux Rapids are in danger of flooding. The low portion of Highway 71 north of the bridge in Sioux Rapids may begin to flood.
22.5 ft
Park St, as well as the northern portion of 1st St in Sioux Rapids begin to flood.
21 ft
The lowest campsites at the campground in Linn Grove begin to flood.
20 ft
Significant flooding of agricultural land begins along this entire stretch of the river. Water begins to flood the lower road at the campground in Linn Grove.
16.5 ft
More substantial flooding of agricultural land as well as the park in Sioux Rapids begins
14 ft
Water begins to overtop the lowest banks as well as spill in the lowest areas of the park in Sioux Rapids.
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 | 29.98 ft | 54,500 cfs |
| Jun 22, 2024 | 29.98 ft | 54,500 cfs |
| Mar 15, 2019 | 24.13 ft | 26,400 cfs |
| Mar 15, 2019 | 24.13 ft | 26,400 cfs |
| Sep 21, 2018 | 23.91 ft | 20,100 cfs |
About This Gauge
USGS Site
NWS LID
LNNI4
River
Little Sioux River
County
Buena Vista, IA
Coordinates
42.8963°N, 95.2431°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 at Linn Grove?
The Little Sioux River at Linn Grove gauge is maintained by USGS (site 06605850) 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 at Linn Grove?
The NWS-defined flood stage for Little Sioux River at Linn Grove is 16.5 feet. Action stage begins at 14 feet. Moderate flooding starts at 20 feet, and major flooding at 22.5 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 at Linn Grove to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category — even when your screen is off.
Where is the Little Sioux River at Linn Grove gauge located?
The gauge is located in Buena Vista County, Iowa at coordinates 42.8963°N, 95.2431°W. USGS site number: 06605850. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: Observations courtesy of U.S. Geological Survey, Observations courtesy of U.S. Army Corps of Engineers
- River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 48 hours into the future from the forecast issuance time.
- River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.
- Gauge reading may be affected by ice.