Flat Brook Near Flatbrookville NJ
USGS Site No: 01440000 • Flat Brook • Sussex County, NJ
Flat Brook Near Flatbrookville NJ on the Flat Brook is currently at 67 cfs (Normal — 53th percentile for this date) . Gage height: 2.27 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 | 32 | |
| 25th | Low threshold | 42 | |
| 50th (Median) | Normal (median) | 62 | |
| 75th | High threshold | 101 | Today: 67 cfs |
| 95th | Very High threshold | 209 |
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 29, 2026 | 71 | — |
| May 28, 2026 | 83 | — |
| May 27, 2026 | 103 | — |
| May 26, 2026 | 153 | — |
| May 25, 2026 | 197 | — |
| May 24, 2026 | 182 | — |
| May 23, 2026 | 53 | — |
| May 22, 2026 | 44 | — |
| May 21, 2026 | 44 | — |
| May 20, 2026 | 43 | — |
| May 19, 2026 | 45 | — |
| May 18, 2026 | 50 | — |
| May 17, 2026 | 58 | — |
| May 16, 2026 | 62 | — |
| May 15, 2026 | 62 | — |
| Apr 21, 2026 | 94 | — |
| Apr 20, 2026 | 135 | — |
| Apr 19, 2026 | 106 | — |
| Apr 18, 2026 | 79 | — |
| Apr 17, 2026 | 73 | — |
| Apr 16, 2026 | 77 | — |
| Apr 15, 2026 | 72 | — |
| Apr 14, 2026 | 65 | — |
| Apr 13, 2026 | 63 | — |
| Apr 12, 2026 | 68 | — |
| Apr 11, 2026 | 71 | — |
| Apr 10, 2026 | 72 | — |
| Apr 9, 2026 | 75 | — |
| Apr 8, 2026 | 81 | — |
| Apr 7, 2026 | 89 | — |
Station Information
- USGS Site No
- 01440000
- State
- NJ
- County
- Sussex County
- Coordinates
- 41.1061, -74.9525
- Drainage Area
- 64 mi²
- Datum (ft)
- 347.0
- HUC Code
- 020401041003
Flood Stage Thresholds
- Action Stage
- 5.0 ft
- Flood Stage
- 6.0 ft
- Moderate Flood
- 7.0 ft
- Major Flood
- 9.0 ft
Currently 3.73 ft below flood stage.
Recent Extremes
- Max discharge
-
1,030 cfsMay 10, 2025
- Min discharge
-
9 cfsOct 7, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Rockaway River at Berkshire Valley NJNormal22.2 mi · 21 cfs
-
Green Pond Bk below Picatinny Lake at Picatinny Ars NJNormal23.3 mi · 6 cfs
-
South Branch Raritan River at Four Bridges NJVery Low23.5 mi · 16 cfs
- Unknown
-
Green Pond Brook at Picatinny Arsenal NJNormal23.8 mi · 6 cfs