South Branch Rock River at Waupun, WI
USGS Site No: 05423500 • South Branch Rock River • Fond du Lac County, WI
South Branch Rock River at Waupun, WI on the South Branch Rock River is currently at 55 cfs (High — 82th percentile for this date) . Gage height: 2.63 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 | 1 | |
| 25th | Low threshold | 4 | |
| 50th (Median) | Normal (median) | 10 | |
| 75th | High threshold | 23 | |
| 95th | Very High threshold | 117 | Today: 55 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 | 56 | — |
| May 27, 2026 | 54 | — |
| May 26, 2026 | 41 | — |
| May 25, 2026 | 29 | — |
| May 24, 2026 | 29 | — |
| May 23, 2026 | 31 | — |
| May 22, 2026 | 32 | — |
| May 21, 2026 | 35 | — |
| May 20, 2026 | 38 | — |
| May 19, 2026 | 43 | — |
| May 18, 2026 | 48 | — |
| May 17, 2026 | 49 | — |
| May 16, 2026 | 48 | — |
| May 15, 2026 | 43 | — |
| Apr 20, 2026 | 276 | — |
| Apr 19, 2026 | 340 | — |
| Apr 18, 2026 | 419 | — |
| Apr 17, 2026 | 452 | — |
| Apr 16, 2026 | 528 | — |
| Apr 15, 2026 | 403 | — |
| Apr 14, 2026 | 376 | — |
| Apr 13, 2026 | 186 | — |
| Apr 12, 2026 | 163 | — |
| Apr 11, 2026 | 129 | — |
| Apr 10, 2026 | 138 | — |
| Apr 9, 2026 | 136 | — |
| Apr 8, 2026 | 146 | — |
| Apr 7, 2026 | 174 | — |
| Apr 6, 2026 | 232 | — |
| Apr 5, 2026 | 305 | — |
Station Information
- USGS Site No
- 05423500
- State
- WI
- County
- Fond du Lac County
- Coordinates
- 43.6417, -88.7207
- Drainage Area
- 64 mi²
- Datum (ft)
- 863.5
- HUC Code
- 07090001
Flood Stage Thresholds
- Action Stage
- 4.0 ft
- Flood Stage
- 6.0 ft
- Moderate Flood
- 8.0 ft
- Major Flood
- 10.0 ft
Currently 3.37 ft below flood stage.
Recent Extremes
- Max discharge
-
528 cfsApr 16, 2026
- Min discharge
-
2 cfsSep 21, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Rock River at Horicon, WINormal13.9 mi · 195 cfs
-
Beaverdam River at Beaver Dam, WIHigh15.0 mi · 173 cfs
-
White Creek at Spring Grove Road near Green Lake, WIHigh15.9 mi · 6 cfs
-
Green Lake Inlet at CT Highway at near Green Lake, WIVery Low16.3 mi · -8 cfs
-
Silver Creek at Spaulding Road Near Green Lake, WINormal16.6 mi · 26 cfs