Musselshell River at Mosby Mount
USGS Site No: 06130500 • Musselshell River • Petroleum County, MT
Musselshell River at Mosby Mount on the Musselshell River is currently at 10 cfs (Low — 15th percentile for this date) . Gage height: 2.17 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 | 0 | |
| 25th | Low threshold | 29 | Today: 10 cfs |
| 50th (Median) | Normal (median) | 72 | |
| 75th | High threshold | 110 | |
| 95th | Very High threshold | 317 |
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 | 14 | — |
| May 27, 2026 | 22 | — |
| May 26, 2026 | 35 | — |
| May 25, 2026 | 46 | — |
| May 24, 2026 | 71 | — |
| May 23, 2026 | 99 | — |
| May 22, 2026 | 129 | — |
| May 21, 2026 | 139 | — |
| May 20, 2026 | 151 | — |
| May 19, 2026 | 139 | — |
| May 18, 2026 | 71 | — |
| May 17, 2026 | 72 | — |
| May 16, 2026 | 47 | — |
| May 15, 2026 | 16 | — |
| Apr 20, 2026 | 28 | — |
| Apr 19, 2026 | 30 | — |
| Apr 18, 2026 | 31 | — |
| Apr 17, 2026 | 27 | — |
| Apr 16, 2026 | 25 | — |
| Apr 15, 2026 | 36 | — |
| Apr 14, 2026 | 51 | — |
| Apr 13, 2026 | 54 | — |
| Apr 12, 2026 | 60 | — |
| Apr 11, 2026 | 65 | — |
| Apr 10, 2026 | 70 | — |
| Apr 9, 2026 | 92 | — |
| Apr 8, 2026 | 109 | — |
| Apr 7, 2026 | 116 | — |
| Apr 6, 2026 | 112 | — |
| Apr 5, 2026 | 120 | — |
Station Information
- USGS Site No
- 06130500
- State
- MT
- County
- Petroleum County
- Coordinates
- 46.9947, -107.8892
- Drainage Area
- 7,784 mi²
- Datum (ft)
- 2,493.9
- HUC Code
- 10040205
Flood Stage Thresholds
- Action Stage
- 8.0 ft
- Flood Stage
- 10.0 ft
- Moderate Flood
- 12.0 ft
- Major Flood
- 14.0 ft
Currently 7.83 ft below flood stage.
Recent Extremes
- Max discharge
-
576 cfsJul 23, 2025
- Min discharge
-
5 cfsJul 5, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Flatwillow Creek Near Mosby MountNormal5.0 mi · 9 cfs
-
Musselshell River at Musselshell MountHigh34.2 mi · 131 cfs
-
Musselshell River Near Roundup MountHigh50.8 mi · 207 cfs
-
Missouri River Near Landusky MountNormal57.8 mi · 6,420 cfs
-
Musselshell River above Big Coulee Creek at Lavina MountVery High69.6 mi · 232 cfs