Bighorn River at Basin, WY
River level and flood forecast · Big Horn County
Normal3.3 ftas of Mon 1:15 PM
The river is 7.2 ft below flood stage (10.5 ft).
Flow: 861 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 5 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 13 ft |
| Moderate flood stage | 11 ft |
| Flood stage | 10.5 ft |
| Action stage | 9.5 ft |
| Record crest (June 11, 2011) | 10.8 ft |
What floods at each level
From the National Weather Service, highest first.
- 11 ftExtensive major agricultural flooding upstream and downstream of Basin. Low lying areas along county road just east of bridge may be under water. Water begins to totally inundate boat ramp and adjacent house near boat ramp in Basin.
- 10.8 ftRecord stage---(6/11/2011)
- 10.5 ftFlood stage. Widespread major agricultural flooding upstream and downstream of Basin. Water begins to encroach boat ramp and adjacent house near boat ramp in Basin.
- 10.49 ftRecord flow---19,500 cfs (6/7/1991).
- 10 ftModerate to major agricultural flooding intensifies and becomes more widespread upstream and downstream of Basin.
- 9.5 ftBankfull stage. Minor agricultural flooding continues to expand upstream and downstream of Basin.
- 9 ftMinor agricultural flooding begins upstream and downstream of Basin.
Highest crests on record
- 10.8 ft — June 11, 2011
- 10.49 ft — June 7, 1991
- 10 ft — June 15, 1997
- 9.73 ft — May 29, 2019
- 9.72 ft — June 17, 2010
Recent crests: 7.19 ft (March 8, 2020) · 9.73 ft (May 29, 2019) · 9.39 ft (June 8, 2018) · 9.46 ft (June 13, 2017) · 9.65 ft (October 4, 2016)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (BHBW4); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.