Flathead River Near Polson Mount
USGS Site No: 12372000 • Flathead River • Lake County, MT
Flathead River Near Polson Mount on the Flathead River is currently at 39,400 cfs (Very High — 118th percentile for this date) . Gage height: 13.86 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 | 4,020 | |
| 25th | Low threshold | 5,350 | |
| 50th (Median) | Normal (median) | 7,560 | |
| 75th | High threshold | 10,100 | |
| 95th | Very High threshold | 11,900 |
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 | 32,400 | — |
| May 27, 2026 | 27,700 | — |
| May 26, 2026 | 25,100 | — |
| May 25, 2026 | 24,800 | — |
| May 24, 2026 | 24,500 | — |
| May 23, 2026 | 24,700 | — |
| May 22, 2026 | 24,800 | — |
| May 21, 2026 | 25,000 | — |
| May 20, 2026 | 26,000 | — |
| May 19, 2026 | 28,600 | — |
| May 18, 2026 | 30,100 | — |
| May 17, 2026 | 30,200 | — |
| May 16, 2026 | 30,100 | — |
| May 15, 2026 | 30,200 | — |
| Apr 20, 2026 | 14,900 | — |
| Apr 19, 2026 | 14,900 | — |
| Apr 18, 2026 | 14,900 | — |
| Apr 16, 2026 | 15,100 | — |
| Apr 13, 2026 | 15,000 | — |
| Apr 12, 2026 | 15,000 | — |
| Apr 11, 2026 | 15,000 | — |
| Apr 10, 2026 | 15,000 | — |
| Apr 8, 2026 | 15,000 | — |
| Apr 7, 2026 | 14,800 | — |
| Apr 6, 2026 | 14,700 | — |
| Apr 5, 2026 | 14,800 | — |
| Apr 4, 2026 | 14,800 | — |
| Apr 3, 2026 | 14,800 | — |
| Apr 2, 2026 | 14,500 | — |
| Apr 1, 2026 | 14,900 | — |
Station Information
- USGS Site No
- 12372000
- State
- MT
- County
- Lake County
- Coordinates
- 47.6803, -114.2467
- Drainage Area
- 7,079 mi²
- Datum (ft)
- 2,692.7
- HUC Code
- 17010212
Flood Stage Thresholds
- Flood Stage
- 18.0 ft
Currently 4.14 ft below flood stage.
Recent Extremes
- Max discharge
-
32,400 cfsMay 28, 2026
- Min discharge
-
3,860 cfsOct 25, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Flathead River at Perma MountVery High26.8 mi · 37,000 cfs
-
Swan River Near Bigfork, MountVery High26.8 mi · 3,920 cfs
-
Mission Creek above Reservoir near St. Ignatius MountVery High27.7 mi · 319 cfs
-
Clark Fork Near Plains MountVery High33.3 mi · 59,600 cfs
-
Stillwater River at Lawrence Park, at KalispellVery High37.2 mi · 609 cfs