Colgan C near Sebastopol CA
USGS Site No: 11465700 • Sonoma County, CA
Colgan C near Sebastopol CA is currently at 0 cfs (Normal — 26th percentile for this date) . Gage height: 68.29 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 | 0 | |
| 25th | Low threshold | 0 | |
| 50th (Median) | Normal (median) | 0 | Today: 0 cfs |
| 75th | High threshold | 1 | |
| 95th | Very High threshold | 3 |
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 | 3 | — |
| May 27, 2026 | 1 | — |
| May 26, 2026 | 1 | — |
| May 25, 2026 | 1 | — |
| May 24, 2026 | 1 | — |
| May 23, 2026 | 1 | — |
| May 22, 2026 | 0 | — |
| May 21, 2026 | 0 | — |
| May 20, 2026 | 0 | — |
| May 19, 2026 | 0 | — |
| May 18, 2026 | 0 | — |
| May 17, 2026 | 0 | — |
| May 16, 2026 | 0 | — |
| May 15, 2026 | 1 | — |
| Apr 20, 2026 | 37 | — |
| Apr 19, 2026 | 1 | — |
| Apr 18, 2026 | 1 | — |
| Apr 17, 2026 | 1 | — |
| Apr 16, 2026 | 1 | — |
| Apr 15, 2026 | 1 | — |
| Apr 14, 2026 | 3 | — |
| Apr 13, 2026 | 12 | — |
| Apr 12, 2026 | 34 | — |
| Apr 11, 2026 | 28 | — |
| Apr 10, 2026 | 22 | — |
| Apr 9, 2026 | 0 | — |
| Apr 8, 2026 | 0 | — |
| Apr 7, 2026 | 0 | — |
| Apr 6, 2026 | 0 | — |
| Apr 5, 2026 | 0 | — |
Station Information
- USGS Site No
- 11465700
- State
- CA
- County
- Sonoma County
- Coordinates
- 38.3735, -122.7683
- Drainage Area
- 7 mi²
- Datum (ft)
- 2.7
- HUC Code
- 18010110
Flood Stage Thresholds
- Action Stage
- 73.5 ft
- Flood Stage
- 75.0 ft
- Moderate Flood
- 76.5 ft
- Major Flood
- 79.0 ft
Currently 6.71 ft below flood stage.
Recent Extremes
- Max discharge
-
180 cfsJan 5, 2026
- Min discharge
-
0 cfsNov 12, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Laguna DE Santa Rosa at Stony Pt Road near Cotati CAHigh2.0 mi · 6 cfs
-
Colgan C near Santa Rosa CAUnknown2.7 mi · 0 cfs
-
Copeland C at Rohnert Park CAUnknown4.2 mi · 2 cfs
-
Russian River near Windsor CANormal11.1 mi · 267 cfs
-
Sonoma Creek at Kenwood CANormal11.6 mi · 2 cfs