Big Sioux River near Watertown
Critical Stages
9' - Action
10' - Flood
11' - Moderate
12' - Major
Latest Observation
Updated: 4:00 PM CST 12/15/25
Status: No Flooding
Stage: 4.48 ft
Flow: -999 kcfs
Forecast
Forecast not available for this location.
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 4:00 PM 12/15 | 4.48 | -999 |
| 3:45 PM 12/15 | 4.5 | -999 |
| 3:30 PM 12/15 | 4.49 | -999 |
| 3:15 PM 12/15 | 4.5 | -999 |
| 3:00 PM 12/15 | 4.5 | -999 |
| 2:45 PM 12/15 | 4.5 | -999 |
| 2:30 PM 12/15 | 4.5 | -999 |
| 2:15 PM 12/15 | 4.52 | -999 |
| 2:00 PM 12/15 | 4.52 | -999 |
| 1:45 PM 12/15 | 4.53 | -999 |
| 1:30 PM 12/15 | 4.52 | -999 |
| 1:15 PM 12/15 | 4.52 | -999 |
| 1:00 PM 12/15 | 4.53 | -999 |
| 12:45 PM 12/15 | 4.53 | -999 |
| 12:30 PM 12/15 | 4.51 | -999 |
| 12:15 PM 12/15 | 4.51 | -999 |
| 12:00 PM 12/15 | 4.51 | -999 |
| 11:45 AM 12/15 | 4.53 | -999 |
| 11:30 AM 12/15 | 4.51 | -999 |
| 11:15 AM 12/15 | 4.52 | -999 |
| 11:00 AM 12/15 | 4.51 | -999 |
| 10:45 AM 12/15 | 4.51 | -999 |
| 10:30 AM 12/15 | 4.51 | -999 |
| 10:15 AM 12/15 | 4.52 | -999 |
| 10:00 AM 12/15 | 4.52 | -999 |
| 9:45 AM 12/15 | 4.52 | -999 |
| 9:30 AM 12/15 | 4.5 | -999 |
| 9:15 AM 12/15 | 4.51 | -999 |
| 9:00 AM 12/15 | 4.5 | -999 |
| 8:45 AM 12/15 | 4.49 | -999 |
20' -
The bridge at the gaging location is overtopped
19' -
The bridge 1 mile south of the gage is overtopped
16' -
The water reaches the bottom of the bridge at the gage and the bridge 1 mile south of the gage
13' -
Flooding begins to affect the city of watertown and the sidewalk on the highway 81 bridge is overtopped
12.5' -
County roads begin to flood
11.5' -
Significant amounts of pasture and crop land are flooded
9' -
The lowest banks are overtopped and minimal areas of pasture land will be flooded
| Date | Stage (ft) |
|---|---|
| Apr 7, 2001 | 12.33 |
| Apr 5, 1997 | 12.09 |
| Apr 13, 2023 | 11.85 |
| Mar 28, 2019 | 11.21 |
| Jun 21, 1991 | 11.13 |
| Mar 30, 1986 | 11.08 |
| Mar 28, 1993 | 11.07 |
| Mar 30, 1978 | 11.07 |
| Mar 14, 1996 | 10.67 |
| Mar 15, 2010 | 10.66 |
| Mar 23, 2011 | 10.3 |
| May 31, 2022 | 10.11 |
| Mar 20, 1994 | 9.86 |
| Apr 13, 1979 | 9.82 |
| Jun 19, 2014 | 9.82 |
| Mar 22, 2007 | 9.82 |
| Mar 12, 1995 | 9.81 |
| Mar 17, 1985 | 9.62 |
| Jun 16, 1984 | 9.25 |
| Oct 23, 2019 | 9.08 |
Data provided by the National Weather Service.
