South F Catoctin Creek at Rt 698 Near Waterford, VA
USGS Site No: 01638350 • South F Catoctin Creek • Loudoun County, VA
South F Catoctin Creek at Rt 698 Near Waterford, VA on the South F Catoctin Creek is currently at 13 cfs (Normal — 56th percentile for this date) . Gage height: 0.96 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 | 5 | |
| 50th (Median) | Normal (median) | 8 | |
| 75th | High threshold | 27 | Today: 13 cfs |
| 95th | Very High threshold | 105 |
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 | 20 | — |
| May 27, 2026 | 23 | — |
| May 26, 2026 | 24 | — |
| May 25, 2026 | 30 | — |
| May 24, 2026 | 62 | — |
| May 23, 2026 | 61 | — |
| May 22, 2026 | 13 | — |
| May 21, 2026 | 12 | — |
| May 20, 2026 | 5 | — |
| May 19, 2026 | 4 | — |
| May 18, 2026 | 5 | — |
| May 17, 2026 | 5 | — |
| May 16, 2026 | 6 | — |
| May 15, 2026 | 6 | — |
| Apr 21, 2026 | 10 | — |
| Apr 20, 2026 | 14 | — |
| Apr 19, 2026 | 15 | — |
| Apr 18, 2026 | 9 | — |
| Apr 17, 2026 | 10 | — |
| Apr 16, 2026 | 10 | — |
| Apr 15, 2026 | 11 | — |
| Apr 14, 2026 | 11 | — |
| Apr 13, 2026 | 12 | — |
| Apr 12, 2026 | 12 | — |
| Apr 11, 2026 | 12 | — |
| Apr 10, 2026 | 13 | — |
| Apr 9, 2026 | 13 | — |
| Apr 8, 2026 | 14 | — |
| Apr 7, 2026 | 16 | — |
| Apr 6, 2026 | 21 | — |
Station Information
- USGS Site No
- 01638350
- State
- VA
- County
- Loudoun County
- Coordinates
- 39.1911, -77.6154
- Drainage Area
- 32 mi²
- Datum (ft)
- 336.0
- HUC Code
- 02070008
Flood Stage Thresholds
- Action Stage
- 7.0 ft
- Flood Stage
- 8.0 ft
- Moderate Flood
- 10.0 ft
- Major Flood
- 15.0 ft
Currently 7.04 ft below flood stage.
Recent Extremes
- Max discharge
-
301 cfsJun 18, 2025
- Min discharge
-
1 cfsSep 15, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Potomac River at Point Of Rocks, MDVery High6.9 mi · 34,600 cfs
-
Catoctin Creek Near Middletown, MDHigh16.6 mi · 101 cfs
-
Antietam Creek Near Sharpsburg, MDHigh18.9 mi · 271 cfs
-
Marsh Run at Grimes, MDHigh24.0 mi · 13 cfs
-
Patuxent River Near Unity, MDNormal30.1 mi · 24 cfs