Whetstone River Near Big Stone City, SD
USGS Site No: 05291000 • Whetstone River • Grant County, SD
Whetstone River Near Big Stone City, SD on the Whetstone River is currently at 63 cfs (High — 81th percentile for this date) . Gage height: 1.98 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 | 2 | |
| 25th | Low threshold | 4 | |
| 50th (Median) | Normal (median) | 8 | |
| 75th | High threshold | 24 | |
| 95th | Very High threshold | 145 | Today: 63 cfs |
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 | 71 | — |
| May 27, 2026 | 77 | — |
| May 26, 2026 | 87 | — |
| May 25, 2026 | 99 | — |
| May 24, 2026 | 97 | — |
| May 23, 2026 | 89 | — |
| May 22, 2026 | 71 | — |
| May 21, 2026 | 70 | — |
| May 20, 2026 | 71 | — |
| May 19, 2026 | 70 | — |
| May 18, 2026 | 61 | — |
| May 17, 2026 | 58 | — |
| May 16, 2026 | 60 | — |
| May 15, 2026 | 62 | — |
| Apr 20, 2026 | 85 | — |
| Apr 19, 2026 | 90 | — |
| Apr 18, 2026 | 98 | — |
| Apr 17, 2026 | 109 | — |
| Apr 16, 2026 | 119 | — |
| Apr 15, 2026 | 127 | — |
| Apr 14, 2026 | 127 | — |
| Apr 13, 2026 | 120 | — |
| Apr 12, 2026 | 119 | — |
| Apr 11, 2026 | 116 | — |
| Apr 10, 2026 | 124 | — |
| Apr 9, 2026 | 136 | — |
| Apr 8, 2026 | 160 | — |
| Apr 7, 2026 | 159 | — |
| Apr 6, 2026 | 141 | — |
| Apr 5, 2026 | 127 | — |
Station Information
- USGS Site No
- 05291000
- State
- SD
- County
- Grant County
- Coordinates
- 45.2834, -96.5104
- Drainage Area
- 398 mi²
- Datum (ft)
- 995.1
- HUC Code
- 07020001
Flood Stage Thresholds
- Action Stage
- 11.0 ft
- Flood Stage
- 12.0 ft
- Moderate Flood
- 15.0 ft
- Major Flood
- 20.0 ft
Currently 10.02 ft below flood stage.
Recent Extremes
- Max discharge
-
3,330 cfsJun 27, 2025
- Min discharge
-
6 cfsFeb 10, 2026
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
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Minnesota River at Ortonville, MNNormal3.3 mi · 51 cfs
-
North Fork Yellow Bank River Near Odessa, MNVery Low8.0 mi · 0 cfs
-
Yellow Bank River Near Odessa, MNHigh8.8 mi · 67 cfs
-
Pomme DE Terre River at Appleton, MNHigh24.5 mi · 177 cfs
-
Big Coulee Creek Near Peever,sdVery High25.9 mi · 11 cfs