Rivers in South Dakota

James River near Forestburg

Sanborn County, South DakotaNWS FORS2USGS 06477000Sioux Falls office

Below flood stage
4.82ftStage

Observed Sat, Sep 26, 9:15 PM CDT

Flood stage
12.00 ft
Record crest
20.61 ft1997

Open the live map with the river flood outlook

Flood stages and impacts

CategoryStage
Major flood18.00 ft
Moderate flood14.50 ft
Minor flood12.00 ft
Action10.00 ft
  1. 20.00 ft405th Ave is flooded and thus most river crossings are impassible resulting in significant travel disruptions.
  2. 19.00 ftPortions of Hwy 34 begin to flood and the bridge on 407th at the gauge is overtopped.
  3. 18.00 ftCounty Road 21 in northern Davison County will be flooded and water may begin to impact the gauge house.
  4. 16.00 ftWater reaches the bottom of the bridge at the gauge on 407th and the road north of the bridge may be flooded.
  5. 14.50 ftMany of the county roads in the area are impassible including 407th, 240th, 241st and 243rd and some roads are under water for as much as 1/2 mile.
  6. 13.00 ft241st St begins to flood where it crosses the river.
  7. 12.00 ftSignificant portions of the floodplain begin to flood and a couple county or township roads may begin to flood.
  8. 10.00 ftThe lowest banks begin to flood

Flood outlook

Chance of flooding, September to November

CategoryChance
Minor flooding24%
Moderate flooding9%
Major floodingUnder 5%

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

Crest history

78 crests on NOAA’s list since 1920.

#DateStage
1April 6, 199720.61 ft
2March 25, 201120.27 ft
3March 25, 201019.14 ft
4May 8, 200718.93 ft
5April 10, 200118.84 ft
6March 29, 192018.00 ft
7March 24, 192218.00 ft
8April 25, 201917.37 ft
9April 22, 199517.26 ft
10April 9, 196917.16 ft
11March 31, 196216.40 ft
12April 2, 196016.27 ft
13May 14, 200916.03 ft
14May 13, 198615.76 ft
15June 25, 198415.75 ft
16March 24, 199415.73 ft
17April 16, 195215.46 ft
18March 12, 202015.45 ft
19April 26, 202315.37 ft
20April 2, 197815.24 ft
21May 30, 195015.06 ft
22May 22, 199914.75 ft
23March 29, 198714.59 ft
24May 24, 199814.53 ft
25August 4, 199314.13 ft

Most recent crests

  • August 26, 2025: 12.28 ft
  • June 25, 2024: 12.08 ft
  • April 26, 2023: 15.37 ft
  • June 13, 2022: 13.98 ft
  • April 13, 2021: 6.95 ft
  • March 12, 2020: 15.45 ft
  • April 25, 2019: 17.37 ft
  • April 24, 2018: 12.70 ft
  • March 25, 2017: 8.56 ft
  • April 30, 2016: 7.41 ft

Nearby

Upstream, downstream and the gauges around this one.

What this means

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 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.

Sources

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.