Potomac River at Hancock, MD
USGS Site No: 01613000 • Potomac River • Washington County, MD
Potomac River at Hancock, MD on the Potomac River is currently at 16,300 cfs (Very High — 116th percentile for this date) . Gage height: 10.43 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 | 450 | |
| 25th | Low threshold | 591 | |
| 50th (Median) | Normal (median) | 828 | |
| 75th | High threshold | 2,030 | |
| 95th | Very High threshold | 5,190 |
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 | 25,000 | — |
| May 27, 2026 | 15,200 | — |
| May 26, 2026 | 14,400 | — |
| May 25, 2026 | 14,200 | — |
| May 24, 2026 | 20,100 | — |
| May 23, 2026 | 9,010 | — |
| May 22, 2026 | 1,520 | — |
| May 21, 2026 | 989 | — |
| May 20, 2026 | 877 | — |
| May 19, 2026 | 946 | — |
| May 18, 2026 | 1,180 | — |
| May 17, 2026 | 965 | — |
| May 16, 2026 | 1,010 | — |
| May 15, 2026 | 1,040 | — |
| Apr 21, 2026 | 1,610 | — |
| Apr 20, 2026 | 1,660 | — |
| Apr 19, 2026 | 1,490 | — |
| Apr 18, 2026 | 1,520 | — |
| Apr 17, 2026 | 1,620 | — |
| Apr 16, 2026 | 1,700 | — |
| Apr 15, 2026 | 1,770 | — |
| Apr 14, 2026 | 1,890 | — |
| Apr 13, 2026 | 2,010 | — |
| Apr 12, 2026 | 2,160 | — |
| Apr 11, 2026 | 2,320 | — |
| Apr 10, 2026 | 2,480 | — |
| Apr 9, 2026 | 2,710 | — |
| Apr 8, 2026 | 3,000 | — |
| Apr 7, 2026 | 3,260 | — |
| Apr 6, 2026 | 3,300 | — |
Station Information
- USGS Site No
- 01613000
- State
- MD
- County
- Washington County
- Coordinates
- 39.6976, -78.1779
- Drainage Area
- 4,064 mi²
- Datum (ft)
- 383.1
- HUC Code
- 020700040504
Flood Stage Thresholds
- Action Stage
- 21.0 ft
- Flood Stage
- 25.0 ft
- Moderate Flood
- 33.0 ft
- Major Flood
- 35.0 ft
Currently 14.57 ft below flood stage.
Recent Extremes
- Max discharge
-
69,700 cfsMay 14, 2025
- Min discharge
-
481 cfsSep 16, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Tonoloway Creek Near Hancock, MDHigh1.5 mi · 210 cfs
-
Licking Creek at Pectonville, MDHigh7.3 mi · 299 cfs
-
Sideling Hill Creek Near Bellegrove, MDHigh9.4 mi · 201 cfs
-
Tonoloway Creek Near Needmore, PAHigh14.1 mi · 16 cfs
-
Potomac River at Paw Paw, WVVery High18.4 mi · 11,900 cfs