Snake River above Jackson Lake at Flagg Ranch WY
USGS Site No: 13010065 • Snake River • Teton County, WY
Snake River above Jackson Lake at Flagg Ranch WY on the Snake River is currently at 2,800 cfs (Very High — 133th percentile for this date) . Gage height: 5.27 ft.
Reading from
Historical Percentile Comparison
Today's discharge compared to the long-term record for October 28 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.
| Percentile | Label | CFS Threshold | Today's Flow |
|---|---|---|---|
| 10th | Very Low threshold | 214 | |
| 25th | Low threshold | 244 | |
| 50th (Median) | Normal (median) | 345 | |
| 75th | High threshold | 410 | |
| 95th | Very High threshold | 579 |
30-Day Hydrograph
Recent discharge plotted against the historical 10th–95th percentile envelope for the same calendar days. Source: USGS daily values + long-term statistics.
30-Day Flow History
| Date | Discharge (CFS) | Gage Ht (ft) |
|---|---|---|
| May 28, 2026 | 3,240 | — |
| May 27, 2026 | 3,000 | — |
| May 26, 2026 | 2,610 | — |
| May 25, 2026 | 2,190 | — |
| May 24, 2026 | 1,800 | — |
| May 23, 2026 | 1,530 | — |
| May 22, 2026 | 1,560 | — |
| May 21, 2026 | 1,760 | — |
| May 20, 2026 | 1,670 | — |
| May 19, 2026 | 1,770 | — |
| May 18, 2026 | 2,070 | — |
| May 17, 2026 | 2,480 | — |
| May 16, 2026 | 3,110 | — |
| May 15, 2026 | 3,640 | — |
| Apr 20, 2026 | 944 | — |
| Apr 19, 2026 | 895 | — |
| Apr 18, 2026 | 929 | — |
| Apr 17, 2026 | 1,010 | — |
| Apr 16, 2026 | 1,150 | — |
| Apr 15, 2026 | 1,150 | — |
| Apr 14, 2026 | 1,240 | — |
| Apr 13, 2026 | 1,470 | — |
| Apr 12, 2026 | 1,690 | — |
| Apr 11, 2026 | 1,670 | — |
| Apr 10, 2026 | 1,420 | — |
| Apr 9, 2026 | 1,240 | — |
| Apr 8, 2026 | 1,160 | — |
| Apr 7, 2026 | 964 | — |
| Apr 6, 2026 | 833 | — |
| Apr 5, 2026 | 787 | — |
Station Information
- USGS Site No
- 13010065
- State
- WY
- County
- Teton County
- Coordinates
- 44.0989, -110.6675
- Drainage Area
- 486 mi²
- Datum (ft)
- 6,801.6
- HUC Code
- 17040101
Flood Stage Thresholds
- Action Stage
- 9.0 ft
- Flood Stage
- 10.0 ft
- Moderate Flood
- 11.0 ft
Currently 4.73 ft below flood stage.
Recent Extremes
- Max discharge
-
5,550 cfsMay 30, 2025
- Min discharge
-
156 cfsAug 26, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Snake River Near Moran, WYVery High17.1 mi · 4,010 cfs
-
Pacific Creek at Moran, WYVery High18.7 mi · 838 cfs
-
Buffalo Fork above Lava Creek, near Moran, WYVery High21.3 mi · 2,180 cfs
-
Fall River above Yellowstone Canal near Squirrel IDVery High24.2 mi · 1,340 cfs
-
Firehole River at Old Faithful, YnpVery High26.1 mi · 126 cfs