Whippany River at Morristown NJ
USGS Site No: 01381500 • Whippany River • Morris County, NJ
Whippany River at Morristown NJ on the Whippany River is currently at 26 cfs (Low — 22th percentile for this date) . Gage height: 2.02 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 | 22 | |
| 25th | Low threshold | 27 | Today: 26 cfs |
| 50th (Median) | Normal (median) | 34 | |
| 75th | High threshold | 54 | |
| 95th | Very High threshold | 109 |
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 | 26 | — |
| May 28, 2026 | 28 | — |
| May 27, 2026 | 30 | — |
| May 26, 2026 | 37 | — |
| May 25, 2026 | 59 | — |
| May 24, 2026 | 113 | — |
| May 23, 2026 | 34 | — |
| May 22, 2026 | 26 | — |
| May 21, 2026 | 26 | — |
| May 20, 2026 | 24 | — |
| May 19, 2026 | 24 | — |
| May 18, 2026 | 26 | — |
| May 17, 2026 | 26 | — |
| May 16, 2026 | 27 | — |
| May 15, 2026 | 28 | — |
| Apr 21, 2026 | 29 | — |
| Apr 20, 2026 | 31 | — |
| Apr 19, 2026 | 31 | — |
| Apr 18, 2026 | 32 | — |
| Apr 17, 2026 | 35 | — |
| Apr 16, 2026 | 34 | — |
| Apr 15, 2026 | 37 | — |
| Apr 14, 2026 | 34 | — |
| Apr 13, 2026 | 34 | — |
| Apr 12, 2026 | 33 | — |
| Apr 11, 2026 | 34 | — |
| Apr 10, 2026 | 36 | — |
| Apr 9, 2026 | 35 | — |
| Apr 8, 2026 | 36 | — |
| Apr 7, 2026 | 39 | — |
Station Information
- USGS Site No
- 01381500
- State
- NJ
- County
- Morris County
- Coordinates
- 40.8072, -74.4569
- Drainage Area
- 29 mi²
- Datum (ft)
- 259.4
- HUC Code
- 020301030303
Flood Stage Thresholds
- Action Stage
- 5.0 ft
- Flood Stage
- 6.0 ft
- Moderate Flood
- 7.0 ft
- Major Flood
- 8.0 ft
Currently 3.98 ft below flood stage.
Recent Extremes
- Max discharge
-
435 cfsMay 15, 2025
- Min discharge
-
17 cfsFeb 11, 2026
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Whippany River Near Morristown NJVery Low2.9 mi · 9 cfs
-
Whippany River Near Pine Brook NJLow6.3 mi · 48 cfs
-
Passaic River Near Chatham NJNormal6.6 mi · 68 cfs
-
Canoe Brook Near Summit NJNormal6.9 mi · 2 cfs
-
Rockaway River Below Reservoir at Boonton NJNormal7.0 mi · 42 cfs