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Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov will be replaced by the National Water Prediction Service (NWPS), with a target of Spring 2024. Existing AHPS content and features will be preserved and expanded within NWPS. The NWS is now accepting feedback on NWPS. Please visit https://www.weather.gov/owp/operations for more information.

Experimental National Water Center Products: Flood Inundation Mapping services are now available for 10% of the U.S. population. Please visit https://www.weather.gov/owp/operations for more information. The National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via the URL above, as described in the StoryMap here.



Hydrograph River at a Glance Download
Big Sandy River (WY) above Big Sandy Reservoir Stage (ft)Flow (cfs)Highest Forecast: 3.62 ft 6:00AM Dec 04, 2023Highest Forecast: 3.62 ft 7:00AM Dec 04, 2023Highest Forecast: 3.62 ft 8:00AM Dec 04, 2023Highest Forecast: 3.62 ft 9:00AM Dec 04, 2023Highest Forecast: 3.62 ft 10:00AM Dec 04, 2023Highest Forecast: 3.62 ft 11:00AM Dec 04, 2023Highest Forecast: 3.62 ft 12:00PM Dec 04, 2023Highest Forecast: 3.62 ft 1:00PM Dec 04, 2023Highest Forecast: 3.62 ft 2:00PM Dec 04, 2023Highest Forecast: 3.62 ft 3:00PM Dec 04, 2023Highest Forecast: 3.62 ft 4:00PM Dec 04, 2023Highest Forecast: 3.62 ft 5:00PM Dec 04, 2023Highest Forecast: 3.62 ft 6:00PM Dec 04, 2023Highest Forecast: 3.62 ft 7:00PM Dec 04, 2023Highest Forecast: 3.62 ft 8:00PM Dec 04, 2023Highest Forecast: 3.62 ft 9:00PM Dec 04, 2023Highest Forecast: 3.62 ft 10:00PM Dec 04, 2023Highest Forecast: 3.62 ft 11:00PM Dec 04, 2023Highest Forecast: 3.62 ft 12:00AM Dec 05, 2023Highest Forecast: 3.62 ft 1:00AM Dec 05, 2023Highest Forecast: 3.62 ft 2:00AM Dec 05, 2023Highest Forecast: 3.62 ft 3:00AM Dec 05, 2023Highest Forecast: 3.62 ft 4:00AM Dec 05, 2023Highest Forecast: 3.62 ft 5:00AM Dec 05, 2023Highest Forecast: 3.62 ft 6:00AM Dec 05, 2023Highest Forecast: 3.62 ft 7:00AM Dec 05, 2023Highest Forecast: 3.62 ft 8:00AM Dec 05, 2023Highest Forecast: 3.62 ft 9:00AM Dec 05, 2023Highest Forecast: 3.62 ft 10:00AM Dec 05, 2023Highest Forecast: 3.62 ft 11:00AM Dec 05, 2023Highest Forecast: 3.62 ft 12:00PM Dec 05, 2023Highest Forecast: 3.62 ft 1:00PM Dec 05, 2023Highest Forecast: 3.62 ft 2:00PM Dec 05, 2023Highest Forecast: 3.62 ft 3:00PM Dec 05, 2023Highest Forecast: 3.62 ft 4:00PM Dec 05, 2023Highest Forecast: 3.62 ft 5:00PM Dec 05, 2023Highest Forecast: 3.62 ft 6:00PM Dec 05, 2023Highest Forecast: 3.62 ft 7:00PM Dec 05, 2023Highest Forecast: 3.62 ft 8:00PM Dec 05, 2023Highest Forecast: 3.62 ft 9:00PM Dec 05, 2023Forecast: 3.61 ft 10:00PM Dec 05, 2023Forecast: 3.61 ft 11:00PM Dec 05, 2023Forecast: 3.61 ft 12:00AM Dec 06, 2023Forecast: 3.61 ft 1:00AM Dec 06, 2023Forecast: 3.61 ft 2:00AM Dec 06, 2023Forecast: 3.61 ft 3:00AM Dec 06, 2023Forecast: 3.61 ft 4:00AM Dec 06, 2023Forecast: 3.61 ft 5:00AM Dec 06, 2023Forecast: 3.61 ft 6:00AM Dec 06, 2023Forecast: 3.61 ft 7:00AM Dec 06, 2023Forecast: 3.61 ft 8:00AM Dec 06, 2023Forecast: 3.61 ft 9:00AM Dec 06, 2023Forecast: 3.61 ft 10:00AM Dec 06, 2023Forecast: 3.61 ft 11:00AM Dec 06, 2023Forecast: 3.61 ft 12:00PM Dec 06, 2023Forecast: 3.61 ft 1:00PM Dec 06, 2023Forecast: 3.61 ft 2:00PM Dec 06, 2023Forecast: 3.61 ft 3:00PM Dec 06, 2023Forecast: 3.61 ft 4:00PM Dec 06, 2023Forecast: 3.61 ft 5:00PM Dec 06, 2023Forecast: 3.61 ft 6:00PM Dec 06, 2023Forecast: 3.61 ft 7:00PM Dec 06, 2023Forecast: 3.61 ft 8:00PM Dec 06, 2023Forecast: 3.61 ft 9:00PM Dec 06, 2023Forecast: 3.61 ft 10:00PM Dec 06, 2023Forecast: 3.61 ft 11:00PM Dec 06, 2023Forecast: 3.61 ft 12:00AM Dec 07, 2023Forecast: 3.61 ft 1:00AM Dec 07, 2023Forecast: 3.61 ft 2:00AM Dec 07, 2023Forecast: 3.61 ft 3:00AM Dec 07, 2023Forecast: 3.61 ft 4:00AM Dec 07, 2023Forecast: 3.61 ft 5:00AM Dec 07, 2023Forecast: 3.61 ft 6:00AM Dec 07, 2023Forecast: 3.61 ft 7:00AM Dec 07, 2023Forecast: 3.61 ft 8:00AM Dec 07, 2023Forecast: 3.61 ft 9:00AM Dec 07, 2023Forecast: 3.61 ft 10:00AM Dec 07, 2023Forecast: 3.61 ft 11:00AM Dec 07, 2023Forecast: 3.61 ft 12:00PM Dec 07, 2023Forecast: 3.61 ft 1:00PM Dec 07, 2023Forecast: 3.61 ft 2:00PM Dec 07, 2023Forecast: 3.61 ft 3:00PM Dec 07, 2023Forecast: 3.61 ft 4:00PM Dec 07, 2023Forecast: 3.61 ft 5:00PM Dec 07, 2023Forecast: 3.61 ft 6:00PM Dec 07, 2023Forecast: 3.61 ft 7:00PM Dec 07, 2023Forecast: 3.61 ft 8:00PM Dec 07, 2023Forecast: 3.61 ft 9:00PM Dec 07, 2023Forecast: 3.61 ft 10:00PM Dec 07, 2023Forecast: 3.61 ft 11:00PM Dec 07, 2023Forecast: 3.61 ft 12:00AM Dec 08, 2023Forecast: 3.61 ft 1:00AM Dec 08, 2023Forecast: 3.61 ft 2:00AM Dec 08, 2023Forecast: 3.61 ft 3:00AM Dec 08, 2023Forecast: 3.61 ft 4:00AM Dec 08, 2023Forecast: 3.61 ft 5:00AM Dec 08, 2023Forecast: 3.61 ft 6:00AM Dec 08, 2023Forecast: 3.61 ft 7:00AM Dec 08, 2023Forecast: 3.61 ft 8:00AM Dec 08, 2023Forecast: 3.61 ft 9:00AM Dec 08, 2023Forecast: 3.61 ft 10:00AM Dec 08, 2023Forecast: 3.61 ft 11:00AM Dec 08, 2023Forecast: 3.61 ft 12:00PM Dec 08, 2023Forecast: 3.61 ft 1:00PM Dec 08, 2023Forecast: 3.61 ft 2:00PM Dec 08, 2023Forecast: 3.61 ft 3:00PM Dec 08, 2023Forecast: 3.61 ft 4:00PM Dec 08, 2023Forecast: 3.61 ft 5:00PM Dec 08, 2023Forecast: 3.61 ft 6:00PM Dec 08, 2023Forecast: 3.61 ft 7:00PM Dec 08, 2023Forecast: 3.61 ft 8:00PM Dec 08, 2023Forecast: 3.61 ft 9:00PM Dec 08, 2023Forecast: 3.61 ft 10:00PM Dec 08, 2023Forecast: 3.61 ft 11:00PM Dec 08, 2023Forecast: 3.61 ft 12:00AM Dec 09, 2023Forecast: 3.61 ft 1:00AM Dec 09, 2023Forecast: 3.61 ft 2:00AM Dec 09, 2023Forecast: 3.61 ft 3:00AM Dec 09, 2023Forecast: 3.61 ft 4:00AM Dec 09, 2023Forecast: 3.61 ft 5:00AM Dec 09, 2023USGS--Water Resources of the United StatesBSRW4(plotting HGIRG) Graph Created (5:50AM Dec 4, 2023)Forecast (issued 7:00AM Dec 3)
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (MST)
XML Data
RSS Files
Datum: NAVD88
Metadata
Reliability of the Forecast: Based on unobstructed flow

NOTE: Forecasts for the Big Sandy River (WY) above Big Sandy Reservoir are issued routinely year-round.

Return to Area Map
Flood Categories (in feet)
Major Flood Stage: 0
Moderate Flood Stage: 0
Flood Stage: 0
Action Stage: 7.5
Low Stage (in feet): -9999

Historic Crests
(1) 8.46 ft on 06/03/1986
(2) 8.45 ft on 06/17/1995
(3) 8.10 ft on 06/09/1972
(4) 8.09 ft on 07/02/2011
(5) 8.08 ft on 06/12/1965
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 5.08 ft on 06/07/2021
(2) 5.31 ft on 06/08/2020
(3) 5.08 ft on 06/07/2020
(4) 5.54 ft on 06/09/2019
(5) 5.50 ft on 06/19/2018
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:10
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
8.5 USBLM roads adjacent to river 1 to 2 miles upstream (near USGS cableway) may have water over them at stages above 9.0 feet.
8.46 Record stage and flow---1,890 cfs (6/3/1986).
7.5 Bankfull stage.
Photos
(1) Looking Downstream---Low Flow
(2) Looking Upstream---Low Flow
About This Location Collapse

Latitude: 42.329600° N, Longitude: 109.511900° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft Not Available Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)		 Elevation
(gauge height = flood stage)		 Elevation information source
NAVD88 6794.0 Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  

Current/Historical Observations:
Resources Collapse
Hydrologic Resources Additional Resources
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
Riverton Weather Forecast Office
12744 West U.S. Highway 26
Riverton, WY 82501
(307) 857-3898
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