Yellowstone River Near Sidney Mount
USGS Site No: 06329500 • Yellowstone River • Richland County, MT
Yellowstone River Near Sidney Mount on the Yellowstone River is currently at 8,000 cfs (Very Low — 4th percentile for this date) . Gage height: 3.80 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 | 18,000 | Today: 8,000 cfs |
| 25th | Low threshold | 27,100 | |
| 50th (Median) | Normal (median) | 38,200 | |
| 75th | High threshold | 50,400 | |
| 95th | Very High threshold | 69,800 |
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 | 7,030 | — |
| May 27, 2026 | 7,650 | — |
| May 26, 2026 | 8,630 | — |
| May 25, 2026 | 9,030 | — |
| May 24, 2026 | 9,260 | — |
| May 23, 2026 | 10,100 | — |
| May 22, 2026 | 11,200 | — |
| May 21, 2026 | 12,700 | — |
| May 20, 2026 | 14,300 | — |
| May 19, 2026 | 16,100 | — |
| May 18, 2026 | 17,900 | — |
| May 17, 2026 | 15,200 | — |
| May 16, 2026 | 12,000 | — |
| May 15, 2026 | 9,060 | — |
| Apr 20, 2026 | 8,550 | — |
| Apr 19, 2026 | 9,020 | — |
| Apr 18, 2026 | 9,560 | — |
| Apr 17, 2026 | 10,100 | — |
| Apr 16, 2026 | 10,200 | — |
| Apr 15, 2026 | 9,910 | — |
| Apr 14, 2026 | 8,890 | — |
| Apr 13, 2026 | 8,360 | — |
| Apr 12, 2026 | 7,940 | — |
| Apr 11, 2026 | 7,860 | — |
| Apr 10, 2026 | 7,990 | — |
| Apr 9, 2026 | 8,290 | — |
| Apr 8, 2026 | 8,810 | — |
| Apr 7, 2026 | 9,030 | — |
| Apr 6, 2026 | 8,740 | — |
| Apr 5, 2026 | 8,760 | — |
Station Information
- USGS Site No
- 06329500
- State
- MT
- County
- Richland County
- Coordinates
- 47.6774, -104.1554
- Drainage Area
- 69,099 mi²
- Datum (ft)
- 1,882.9
- HUC Code
- 10100004
Flood Stage Thresholds
- Action Stage
- 17.0 ft
- Flood Stage
- 19.0 ft
- Moderate Flood
- 20.0 ft
- Major Flood
- 21.7 ft
Currently 15.20 ft below flood stage.
Recent Extremes
- Max discharge
-
40,400 cfsJun 5, 2025
- Min discharge
-
1,880 cfsAug 30, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Yellowstone River Fish Bypass Channel near Intake MountUnknown33.8 mi · 0 cfs
-
Missouri River Near Culbertson MountLow34.2 mi · 6,580 cfs
-
Missouri River near Williston, NDUnknown36.1 mi · 0 cfs
-
Beaver Creek near Trotters, NDLow36.3 mi · 2 cfs
-
Big Muddy Creek near Mouth near Culbertson MountLow40.2 mi · 1 cfs