Swan River Near Bigfork, Mount
USGS Site No: 12370000 • Swan River • Lake County, MT
Swan River Near Bigfork, Mount on the Swan River is currently at 3,920 cfs (Normal — 68th percentile for this date) . Gage height: 4.95 ft.
Reading from
Historical Percentile Comparison
Today's discharge compared to the long-term record for June 11 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 | 2,080 | |
| 25th | Low threshold | 2,630 | |
| 50th (Median) | Normal (median) | 3,290 | |
| 75th | High threshold | 4,190 | Today: 3,920 cfs |
| 95th | Very High threshold | 6,460 |
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 | 3,060 | — |
| May 27, 2026 | 2,550 | — |
| May 26, 2026 | 2,170 | — |
| May 25, 2026 | 2,000 | — |
| May 24, 2026 | 1,970 | — |
| May 23, 2026 | 2,050 | — |
| May 22, 2026 | 2,180 | — |
| May 21, 2026 | 2,310 | — |
| May 20, 2026 | 2,520 | — |
| May 19, 2026 | 2,810 | — |
| May 18, 2026 | 3,180 | — |
| May 17, 2026 | 3,580 | — |
| May 16, 2026 | 3,870 | — |
| May 15, 2026 | 3,830 | — |
| Apr 20, 2026 | 1,670 | — |
| Apr 19, 2026 | 1,760 | — |
| Apr 18, 2026 | 1,860 | — |
| Apr 17, 2026 | 1,930 | — |
| Apr 16, 2026 | 1,920 | — |
| Apr 15, 2026 | 1,860 | — |
| Apr 14, 2026 | 1,780 | — |
| Apr 13, 2026 | 1,690 | — |
| Apr 12, 2026 | 1,600 | — |
| Apr 11, 2026 | 1,550 | — |
| Apr 10, 2026 | 1,550 | — |
| Apr 9, 2026 | 1,550 | — |
| Apr 8, 2026 | 1,550 | — |
| Apr 7, 2026 | 1,570 | — |
| Apr 6, 2026 | 1,640 | — |
| Apr 5, 2026 | 1,740 | — |
Station Information
- USGS Site No
- 12370000
- State
- MT
- County
- Lake County
- Coordinates
- 48.0242, -113.9788
- Drainage Area
- 672 mi²
- Datum (ft)
- 3,062.6
- HUC Code
- 17010211
Flood Stage Thresholds
- Action Stage
- 6.0 ft
- Flood Stage
- 6.5 ft
- Moderate Flood
- 7.5 ft
- Major Flood
- 8.0 ft
Currently 1.55 ft below flood stage.
Recent Extremes
- Max discharge
-
3,940 cfsJun 2, 2025
- Min discharge
-
282 cfsSep 29, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
South F Flathead River above Twin C near Hungry Horse MountHigh19.6 mi · 13,600 cfs
-
Stillwater River at Lawrence Park, at KalispellLow20.4 mi · 609 cfs
-
South F Flathead River near Columbia Falls MountHigh23.1 mi · 16,100 cfs
-
Whitefish River Near Kalispell MountVery Low24.7 mi · 67 cfs
-
Flathead River at Columbia Falls MountVery High25.2 mi · 46,300 cfs