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This probabilistic forecast is issued by the Missouri Basin River Forecast Center.
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Experimental Short Range Forecast Uncertainty (AHPS) - External Links: Product Description Document | Customer Survey
About this graph
Forecasts for the Big Sioux River at Watertown Broadway Avenue are issued as needed during times of high water, but are not routinely available.
Return to Area Map

Upstream Gauge - at Watertown Sioux Conifer Road Upstream Gauge
Zoom Level:14
Flood Categories (in feet)
Major Flood Stage: 13.5
Moderate Flood Stage: 11
Flood Stage: 10.5
Action Stage: 10
Low Stage (in feet): -9999

Historic Crests
(1) 13.67 ft on 04/06/1997
(2) 12.71 ft on 04/07/2001
(3) 11.97 ft on 04/12/2011
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 10.65 ft on 05/31/2022
(2) 7.85 ft on 04/10/2021
(3) 9.58 ft on 04/04/2020
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
KML Image
Gauge LocationGauge Map Marker
 Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
18 The bridge on Hwy 81 is overtopped.
17.5 The Broadway Avenue bridge at the gauge is overtopped.
17 4th Avenue SW begins to flood near Kampeska Blvd.
16.5 Broadway Avenue begins to flood.
16 The levees on the north side of the river upstream of the gauge are overtopped, and the gas station will begin flooding.
15 The railroad upstream of Thunder Road begins to flood, and water reaches the bottom of the bridges on Broadway Ave and 4th Ave SW.
14 The levee on the south side of the river upstream from the gauge in overtopped.
11 The lower banks on both sides of the river downstream of the gauge are overtopped, and the lower lying areas along Kampeska Blvd, 4th Ave SW, and Riverside Park on Kemp Ave begin to flood.
Photos
(1) Downstream View
(2) Upstream View

Other Real-time and/or Archive Data Sources:
Additional Information Collapse
How low could the river get?
Collaborative Agencies Collapse
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
Aberdeen Weather Forecast Office
824 Brown County 14 South
Aberdeen, SD 57401
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