Gwynns Falls at Washington Blvd at Baltimore, MD
USGS Site No: 01589352 • Baltimore city, MD
Gwynns Falls at Washington Blvd at Baltimore, MD is currently at 47 cfs (Normal — 56th percentile for this date) . Gage height: 2.58 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 | 20 | |
| 25th | Low threshold | 24 | |
| 50th (Median) | Normal (median) | 33 | |
| 75th | High threshold | 89 | Today: 47 cfs |
| 95th | Very High threshold | 957 |
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 | 73 | — |
| May 27, 2026 | 168 | — |
| May 26, 2026 | 68 | — |
| May 25, 2026 | 112 | — |
| May 24, 2026 | 804 | — |
| May 23, 2026 | 670 | — |
| May 22, 2026 | 123 | — |
| May 21, 2026 | 123 | — |
| May 20, 2026 | 101 | — |
| May 19, 2026 | 28 | — |
| May 18, 2026 | 30 | — |
| May 17, 2026 | 31 | — |
| May 16, 2026 | 32 | — |
| May 15, 2026 | 37 | — |
| Apr 21, 2026 | 31 | — |
| Apr 20, 2026 | 38 | — |
| Apr 19, 2026 | 40 | — |
| Apr 18, 2026 | 33 | — |
| Apr 17, 2026 | 34 | — |
| Apr 16, 2026 | 37 | — |
| Apr 15, 2026 | 54 | — |
| Apr 14, 2026 | 43 | — |
| Apr 13, 2026 | 35 | — |
| Apr 12, 2026 | 36 | — |
| Apr 11, 2026 | 36 | — |
| Apr 10, 2026 | 37 | — |
| Apr 9, 2026 | 38 | — |
| Apr 8, 2026 | 39 | — |
| Apr 7, 2026 | 44 | — |
| Apr 6, 2026 | 64 | — |
Station Information
- USGS Site No
- 01589352
- State
- MD
- County
- Baltimore city
- Coordinates
- 39.2721, -76.6501
- Drainage Area
- 66 mi²
- Datum (ft)
- 6.5
- HUC Code
- 020600030902
Flood Stage Thresholds
- Action Stage
- 11.0 ft
- Flood Stage
- 13.0 ft
- Moderate Flood
- 20.0 ft
- Major Flood
- 22.0 ft
Currently 10.42 ft below flood stage.
Recent Extremes
- Max discharge
-
924 cfsMay 14, 2025
- Min discharge
-
16 cfsSep 9, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Herring Run at Sinclair Lane at Baltimore, MDVery High6.0 mi · 41 cfs
-
West Branch Herring Run at Idlewylde, MDNormal7.8 mi · 1 cfs
-
Patapsco River at Hollofield, MDNormal8.1 mi · 92 cfs
-
Minebank Run Near Glen Arm, MDNormal10.7 mi · 1 cfs
-
Long Quarter Branch at Lutherville, MDVery High11.0 mi · 1 cfs