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This probabilistic forecast is issued by the Missouri Basin River Forecast Center.
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About this graph
Forecasts for the Rock River at Rock Valley are issued as needed during times of high water, but are not routinely available.
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Upstream Gauge - at Rock Rapids Upstream Gauge
Zoom Level:14
Flood Categories (in feet)
Major Flood Stage: 19
Moderate Flood Stage: 17
Flood Stage: 16
Action Stage: 14
Low Stage (in feet): -9999

Historic Crests
(1) 22.72 ft on 06/17/2014
(2) 21.20 ft on 06/22/2018
(3) 20.61 ft on 03/15/2019
(4) 19.97 ft on 05/09/1993
(5) 19.89 ft on 09/25/2010
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 11.25 ft on 04/13/2023
(2) 9.56 ft on 06/01/2022
(3) 6.72 ft on 04/10/2021
(4) 11.63 ft on 07/08/2020
(5) 20.61 ft on 03/15/2019
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
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Gauge LocationGauge Map Marker
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
26 County Highway K30 north of Rock Valley is flooded.
22 the driveway and yard of the house near the gage are flooded.
20 major agricultural flooding begins throughout the flood plain.
19 Rock Valley begins to experience flood problems and sandbagging of storm sewers in the city begins.
16 significant amounts of agricultural lands are flooded, and some rural roads are also threatened by high water.
13 the lowest lying pasture and farm land will experience some minor flooding.
(1) Upstream View
(2) Downstream View

Other Real-time and/or Archive Data Sources:

Additional Information Collapse

USGS 7-Day Streamflow Historical Comparison USGS WaterWatch Webpage

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
Sioux Falls Weather Forecast Office
26 Weather Lane
Sioux Falls, SD 57104-0198
(605) 330-4247
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Page last modified: 2-Nov-2020 7:29 PM
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