Western Branch at Upper Marlboro, MD
USGS Site No: 01594526 • Western Branch • Prince George's County, MD
Western Branch at Upper Marlboro, MD on the Western Branch is currently at 20 cfs (Normal — 26th percentile for this date) . Gage height: 1.78 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 | 10 | |
| 25th | Low threshold | 19 | |
| 50th (Median) | Normal (median) | 35 | Today: 20 cfs |
| 75th | High threshold | 62 | |
| 95th | Very High threshold | 796 |
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 | 31 | — |
| May 27, 2026 | 38 | — |
| May 26, 2026 | 45 | — |
| May 25, 2026 | 84 | — |
| May 24, 2026 | 169 | — |
| May 23, 2026 | 100 | — |
| May 22, 2026 | 41 | — |
| May 21, 2026 | 20 | — |
| May 20, 2026 | 13 | — |
| May 19, 2026 | 14 | — |
| May 18, 2026 | 15 | — |
| May 17, 2026 | 17 | — |
| May 16, 2026 | 22 | — |
| May 15, 2026 | 36 | — |
| Apr 21, 2026 | 20 | — |
| Apr 20, 2026 | 23 | — |
| Apr 19, 2026 | 20 | — |
| Apr 18, 2026 | 22 | — |
| Apr 17, 2026 | 23 | — |
| Apr 16, 2026 | 27 | — |
| Apr 15, 2026 | 27 | — |
| Apr 14, 2026 | 28 | — |
| Apr 13, 2026 | 28 | — |
| Apr 12, 2026 | 29 | — |
| Apr 11, 2026 | 31 | — |
| Apr 10, 2026 | 32 | — |
| Apr 9, 2026 | 34 | — |
| Apr 8, 2026 | 39 | — |
| Apr 7, 2026 | 50 | — |
| Apr 6, 2026 | 98 | — |
Station Information
- USGS Site No
- 01594526
- State
- MD
- County
- Prince George's County
- Coordinates
- 38.8142, -76.7487
- Drainage Area
- 90 mi²
- Datum (ft)
- 4.3
- HUC Code
- 02060006
Flood Stage Thresholds
- Action Stage
- 9.0 ft
- Flood Stage
- 11.0 ft
- Moderate Flood
- 16.0 ft
- Major Flood
- 19.0 ft
Currently 9.22 ft below flood stage.
Recent Extremes
- Max discharge
-
791 cfsJul 20, 2025
- Min discharge
-
11 cfsOct 25, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Fourmile Run at Alexandria, VALow18.3 mi · 4 cfs
-
Sawmill Creek at Glen Burnie, MDLow25.4 mi · 3 cfs
-
Patapsco River Near Elkridge, MDNormal28.6 mi · 132 cfs
-
East Branch Herbert Run at Arbutus, MDNormal29.6 mi · 1 cfs
-
Patapsco River Near Catonsville, MDNormal30.2 mi · 123 cfs