River stage
Flagg Ranch, Snake River
- River level
- 2.55 ft
- Status
- Below flood stage
- 7-day change
- +0.28 ft
- Recent high
- 4.04 ft
- Recent low
- 2.23 ft
Last reported 2026-10-13 | NWS FLGW4
- 30-day change
- +0.31 ft
- Average
- 2.67 ft
- Readings
- 122
- Data span
- 122 days
- Record crest
- 10.75 ft
In brief
The Snake River at Flagg Ranch, WY read 2.55 ft on Oct 13, 2026, 6.45 ft below action stage. That is 0.31 ft higher than 30 days earlier.
Source: National Weather Service gauge FLGW4
Water 50 °F (10 °C) · about normal for this date
River level timeline
Stage threshold profile
Highest crests on record
| Rank | Crest | Date |
|---|---|---|
| 1 | 10.75 ft | 1996-06-05 |
| 2 | 10.16 ft | 1997-06-05 |
| 3 | 9.41 ft | 1986-06-06 |
| 4 | 9.30 ft | 1995-06-06 |
| 5 | 9.25 ft | 2011-06-24 |
| 6 | 9.13 ft | 2009-05-31 |
| 7 | 9.03 ft | 2014-05-28 |
| 8 | 8.74 ft | 2017-06-05 |
Flood crests recorded at this gauge by the National Weather Service.
What happens at each level
- 9.00 ft
Bankfull stage.
- 10.00 ft
Flood stage. Minor flooding along lower sections of parking lot 300 feet downstream of gage on right bank.
- 10.75 ft
Record stage and flow---15,000 cfs (6/5/1996).
- 11.00 ft
Lower sections of downstream parking lot may be under water. Flagg Ranch campgrounds still not affected.
Written by the local National Weather Service forecast office for this exact gauge.
Frequently asked questions
Is the Snake River flooding at Flagg Ranch?
No. The Snake River at Flagg Ranch is at 2.55 ft, 6.45 ft below action stage.
What is the flood stage at Flagg Ranch?
The National Weather Service sets action stage 9 ft, minor flooding 10 ft and moderate flooding 11 ft.
What is the highest the Snake River has been at Flagg Ranch?
The highest crest on record is 10.75 ft, on 1996-06-05.
Is the Snake River high or low right now at Flagg Ranch?
At 2.55 ft it is higher than 57% of readings over the last 122 days.
How warm is the water at Flagg Ranch, Snake River?
The water temperature at Flagg Ranch, Snake River is 50 °F (9.8 °C), measured 7:30 pm by USGS, which is about average for this date over the past ten years. It has fallen 0.6 °F in the last 24 hours.
Stage and flood information from the NOAA National Weather Service (gauge FLGW4); daily history from the U.S. Geological Survey (site 13010065). Last reading 2026-10-13. For flood safety decisions always follow official National Weather Service warnings.