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Advanced Hydrologic Prediction Service
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This probabilistic forecast is issued by the Northwest River Forecast Center.
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About this graph
Forecasts are not available for the Snake River below Jackson Dam. Only observed stages are available for this point.
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Upstream Gauge - at Flagg Ranch Upstream Gauge
Zoom Level:10
Flood Categories (in feet)
Major Flood Stage: 0
Moderate Flood Stage: 0
Flood Stage: 0
Action Stage: 15
Low Stage (in feet): -9999

Historic Crests
(1) 15,100 cfs on 06/12/1918
(2) 14,200 cfs on 06/25/1927
(3) 13,300 cfs on 06/19/1943
(4) 12,100 cfs on 06/06/1910
(5) 12,100 cfs on 06/11/1997
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 5,280 cfs on 07/19/2021
(2) 5,600 cfs on 06/07/2020
(3) 4,680 cfs on 05/18/2019
(4) 7,320 cfs on 05/25/2018
(5) 6,630 cfs on 06/07/2017
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
20 Flood stage. Minor low land flooding.
15 Bankfull stage.
11.63 Record stage---(6/19/1943).
10.41 Record flow---15,100 cfs (6/12/1918).
(1) Looking Upstream at Jackson Lake Dam---Moderate Flow
(2) Looking Upstream at Jackson Lake Dam---Low Flow
(3) Looking Upstream at Jackson Lake Dam---Low Flow
(4) Looking Downstream---Low Flow

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
Riverton Weather Forecast Office
12744 West U.S. Highway 26
Riverton, WY 82501
(307) 857-3898
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Page last modified: 2-Nov-2020 7:28 PM
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