Hawlings River Near Sandy Spring, MD
USGS Site No: 01591700 • Hawlings River • Montgomery County, MD
Hawlings River Near Sandy Spring, MD on the Hawlings River is currently at 11 cfs (Normal — 37th percentile for this date) . Gage height: 0.55 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 | 6 | |
| 25th | Low threshold | 9 | |
| 50th (Median) | Normal (median) | 13 | Today: 11 cfs |
| 75th | High threshold | 24 | |
| 95th | Very High threshold | 106 |
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 | 16 | — |
| May 27, 2026 | 20 | — |
| May 26, 2026 | 20 | — |
| May 25, 2026 | 34 | — |
| May 24, 2026 | 185 | — |
| May 23, 2026 | 71 | — |
| May 22, 2026 | 14 | — |
| May 21, 2026 | 13 | — |
| May 20, 2026 | 8 | — |
| May 19, 2026 | 7 | — |
| May 18, 2026 | 8 | — |
| May 17, 2026 | 8 | — |
| May 16, 2026 | 8 | — |
| May 15, 2026 | 9 | — |
| Apr 21, 2026 | 14 | — |
| Apr 20, 2026 | 14 | — |
| Apr 19, 2026 | 14 | — |
| Apr 18, 2026 | 10 | — |
| Apr 17, 2026 | 10 | — |
| Apr 16, 2026 | 11 | — |
| 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 | 13 | — |
| Apr 7, 2026 | 15 | — |
| Apr 6, 2026 | 19 | — |
Station Information
- USGS Site No
- 01591700
- State
- MD
- County
- Montgomery County
- Coordinates
- 39.1745, -77.0214
- Drainage Area
- 27 mi²
- Datum (ft)
- 302.7
- HUC Code
- 020600060104
Flood Stage Thresholds
- Action Stage
- 5.0 ft
- Flood Stage
- 6.5 ft
Currently 5.95 ft below flood stage.
Recent Extremes
- Max discharge
-
285 cfsJun 18, 2025
- Min discharge
-
4 cfsOct 6, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Patapsco River Near Catonsville, MDVery High14.8 mi · 123 cfs
-
Patapsco River at Hollofield, MDNormal15.4 mi · 92 cfs
-
Patapsco River Near Elkridge, MDVery High16.4 mi · 132 cfs
-
Dead Run Near Catonsville, MDNormal17.0 mi · 0 cfs
-
East Branch Herbert Run at Arbutus, MDNormal18.2 mi · 1 cfs