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This probabilistic forecast is issued by the Missouri Basin River Forecast Center.
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About this graph
Forecasts are not available for the Cheyenne River near Angostura Reservoir. Only observed stages are available for this point.
Return to Area Map

Zoom Level:14
Flood Categories (in feet)
Major Flood Stage: 0
Moderate Flood Stage: 0
Flood Stage: 0
Action Stage: 3187.2
Low Stage (in feet): -9999

Historic Crests
(1) 3,189.37 ft on 05/20/1978
(2) 3,189.00 ft on 06/18/1962
(3) 3,188.42 ft on 05/25/1971
(4) 3,188.00 ft on 06/17/1967
(5) 3,187.91 ft on 05/27/1957
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 3.22 ft on 07/29/2023
(2) 3.07 ft on 06/06/2022
(3) 3,180.96 ft on 05/17/2022
(4) 3,186.78 ft on 05/24/2019
(5) 3,187.14 ft on 03/22/2019
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 3,162.90 ft on 09/28/1960
Show More Low Water Records
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
3199 Dam crest elevation.
3198.1 Maximum Water Surface or Top of Surcharge Capacity.
3195 Discharge from the reservoir is about 120,000 cfs with automatic control; higher with high inflows and manual control.
3187.2 Top of active conservation elevation.
3163 Elevation at top of inactive storage.
3062 Streambed elevation at dam axis.
Photos
(1) Angostura Dam and Reservoir
(2) Releases from Angostura Reservoir
(3) Looking north

Other Real-time and/or Archive Data Sources:
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
Rapid City Weather Forecast Office
300 East Signal Drive
Rapid City, SD 57701-3800
(605) 341-7531
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