Little Sioux River near Turin

1. 37.00 ftWater reaches the bottom of the E54 bridge at the gage site.
2. 34.50 ftWater nears the top of the federal levee.
3. 25.00 ftFlooding may begin near the mouth of the river downstream of Interstate 29. Upstream of the Interstate the river is contained within the levee system.
4. 22.00 ftWater exceeds the top of the natural channel but still remains within the confines of the levee system.

Chance of flooding, September to November

The three-month chances are the River Forecast Centers’ long-range flood outlook, issued September 23, 2026.

Most recent crests

• August 1, 2025: 17.49 ft
• June 26, 2024: 27.37 ft
• March 1, 2023: 20.59 ft
• June 5, 2022: 10.25 ft
• March 4, 2021: 9.07 ft
• February 24, 2020: 16.02 ft
• March 15, 2019: 29.57 ft
• September 25, 2018: 23.86 ft
• May 23, 2017: 15.47 ft
• May 1, 2016: 19.68 ft

• UpstreamWest Fork Ditch at Hornick
• Monona-Harrison Ditch at Turin
• Soldier River at Pisgah
• Missouri River at Decatur
• Willow Creek at Soldier
• Maple River at Mapleton
• Boyer River at Dunlap
• Blackbird Creek

Forecasts by the Missouri Basin River Forecast Center. Forecasts are issued as needed during times of high water, but are not routinely available. 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. 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. Stage may be affected by ice.

Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.