Santa Rosa C at Willowside Road near Santa Rosa CA
USGS Site No: 11466320 • Sonoma County, CA
Santa Rosa C at Willowside Road near Santa Rosa CA is currently at 12 cfs (Normal — 72th percentile for this date) . Gage height: 58.24 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 | 2 | |
| 50th (Median) | Normal (median) | 3 | |
| 75th | High threshold | 13 | Today: 12 cfs |
| 95th | Very High threshold | 290 |
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 | 36 | — |
| May 27, 2026 | 10 | — |
| May 26, 2026 | 11 | — |
| May 25, 2026 | 10 | — |
| May 24, 2026 | 10 | — |
| May 23, 2026 | 10 | — |
| May 22, 2026 | 10 | — |
| May 21, 2026 | 11 | — |
| May 20, 2026 | 11 | — |
| May 19, 2026 | 12 | — |
| May 18, 2026 | 13 | — |
| May 17, 2026 | 14 | — |
| May 16, 2026 | 15 | — |
| May 15, 2026 | 16 | — |
| Apr 20, 2026 | 234 | — |
| Apr 19, 2026 | 23 | — |
| Apr 18, 2026 | 24 | — |
| Apr 17, 2026 | 26 | — |
| Apr 16, 2026 | 28 | — |
| Apr 15, 2026 | 32 | — |
| Apr 14, 2026 | 39 | — |
| Apr 13, 2026 | 71 | — |
| Apr 12, 2026 | 229 | — |
| Apr 11, 2026 | 180 | — |
| Apr 10, 2026 | 151 | — |
| Apr 9, 2026 | 18 | — |
| Apr 8, 2026 | 18 | — |
| Apr 7, 2026 | 18 | — |
| Apr 6, 2026 | 19 | — |
| Apr 5, 2026 | 19 | — |
Station Information
- USGS Site No
- 11466320
- State
- CA
- County
- Sonoma County
- Coordinates
- 38.4452, -122.8072
- Drainage Area
- 78 mi²
- Datum (ft)
- 2.4
- HUC Code
- 18010110
Flood Stage Thresholds
- Action Stage
- 62.5 ft
- Flood Stage
- 70.0 ft
- Moderate Flood
- 74.0 ft
- Major Flood
- 77.0 ft
Currently 11.76 ft below flood stage.
Recent Extremes
- Max discharge
-
1,570 cfsDec 22, 2025
- Min discharge
-
1 cfsNov 2, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Laguna DE Santa Rosa C near Sebastopol CAHigh1.8 mi · 4 cfs
-
Mark West C near Mirabel Heights CAHigh4.2 mi · 40 cfs
-
Santa Rosa C at Santa Rosa CAHigh4.5 mi · 19 cfs
-
Colgan C near Santa Rosa CAUnknown5.0 mi · 0 cfs
-
Colgan C near Sebastopol CANormal5.4 mi · 0 cfs