Black River at Black Rock, AR
USGS Site No: 07072500 • Black River • Lawrence County, AR
Black River at Black Rock, AR on the Black River is currently at 5,030 cfs (High — 78th percentile for this date) . Gage height: 4.20 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 | 2,350 | |
| 25th | Low threshold | 2,790 | |
| 50th (Median) | Normal (median) | 3,130 | |
| 75th | High threshold | 4,140 | |
| 95th | Very High threshold | 10,400 | Today: 5,030 cfs |
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 | 4,060 | — |
| May 27, 2026 | 4,260 | — |
| May 26, 2026 | 4,000 | — |
| May 25, 2026 | 3,760 | — |
| May 24, 2026 | 3,810 | — |
| May 23, 2026 | 3,820 | — |
| May 22, 2026 | 3,830 | — |
| May 21, 2026 | 3,860 | — |
| May 20, 2026 | 3,920 | — |
| May 19, 2026 | 3,990 | — |
| May 18, 2026 | 4,100 | — |
| May 17, 2026 | 4,210 | — |
| May 16, 2026 | 4,310 | — |
| May 15, 2026 | 4,450 | — |
| Apr 20, 2026 | 5,230 | — |
| Apr 19, 2026 | 4,350 | — |
| Apr 18, 2026 | 4,080 | — |
| Apr 17, 2026 | 4,050 | — |
| Apr 16, 2026 | 4,060 | — |
| Apr 15, 2026 | 4,160 | — |
| Apr 14, 2026 | 4,230 | — |
| Apr 13, 2026 | 4,260 | — |
| Apr 12, 2026 | 4,240 | — |
| Apr 11, 2026 | 4,200 | — |
| Apr 10, 2026 | 4,250 | — |
| Apr 9, 2026 | 4,350 | — |
| Apr 8, 2026 | 4,410 | — |
| Apr 7, 2026 | 4,440 | — |
| Apr 6, 2026 | 4,450 | — |
| Apr 5, 2026 | 4,500 | — |
Station Information
- USGS Site No
- 07072500
- State
- AR
- County
- Lawrence County
- Coordinates
- 36.1025, -91.0978
- Drainage Area
- 7,370 mi²
- Datum (ft)
- 229.5
- HUC Code
- 11010009
Flood Stage Thresholds
- Action Stage
- 12.0 ft
- Flood Stage
- 14.0 ft
- Moderate Flood
- 25.0 ft
- Major Flood
- 28.0 ft
Currently 9.80 ft below flood stage.
Recent Extremes
- Max discharge
-
28,500 cfsMay 27, 2025
- Min discharge
-
3,150 cfsFeb 2, 2026
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Spring River at Imboden, ARHigh8.2 mi · 658 cfs
-
Black River at Pocahontas, ARHigh12.7 mi · 3,410 cfs
-
Eleven Point River Near Ravenden Springs, ARNormal16.9 mi · 577 cfs
-
Cache River at Egypt, ARHigh19.3 mi · 2,630 cfs
-
Black River at Elgin Ferry, ARHigh25.9 mi · 5,040 cfs