Snake River at Flagg Ranch, WY
River level and flood forecast · Teton County
Normal2.8 ftas of Mon 12:30 PM
The river is 7.2 ft below flood stage (10 ft).
Forecast to fall to 2.4 ft by Sat, Oct 17, 12 PM.
Flow: 433 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Mon, Oct 12, 1:08 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Moderate flood stage | 11 ft |
| Flood stage | 10 ft |
| Action stage | 9 ft |
| Record crest (June 5, 1996) | 10.75 ft |
What floods at each level
From the National Weather Service, highest first.
- 11 ftLower sections of downstream parking lot may be under water. Flagg Ranch campgrounds still not affected.
- 10.75 ftRecord stage and flow---15,000 cfs (6/5/1996).
- 10 ftFlood stage. Minor flooding along lower sections of parking lot 300 feet downstream of gage on right bank.
- 9 ftBankfull stage.
Highest crests on record
- 10.75 ft — June 5, 1996
- 10.16 ft — June 5, 1997
- 9.41 ft — June 6, 1986
- 9.3 ft — June 6, 1995
- 9.25 ft — June 24, 2011
Recent crests: 6.37 ft (May 19, 2021) · 8.52 ft (June 1, 2020) · 7.52 ft (May 17, 2019) · 8.29 ft (May 26, 2018) · 8.74 ft (June 5, 2017)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (FLGW4); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.