Black River at Elyria OH
USGS Site No: 04200500 • Black River • Lorain County, OH
Black River at Elyria OH on the Black River is currently at 110 cfs (High — 76th percentile for this date) . Gage height: 1.51 ft.
Reading from
Historical Percentile Comparison
Today's discharge compared to the long-term record for October 27 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 | 9 | |
| 25th | Low threshold | 14 | |
| 50th (Median) | Normal (median) | 25 | |
| 75th | High threshold | 66 | |
| 95th | Very High threshold | 778 | Today: 110 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 | 171 | — |
| May 27, 2026 | 256 | — |
| May 26, 2026 | 403 | — |
| May 25, 2026 | 826 | — |
| May 24, 2026 | 2,520 | — |
| May 23, 2026 | 1,220 | — |
| May 22, 2026 | 201 | — |
| May 21, 2026 | 187 | — |
| May 20, 2026 | 108 | — |
| May 19, 2026 | 94 | — |
| May 18, 2026 | 106 | — |
| May 17, 2026 | 112 | — |
| May 16, 2026 | 127 | — |
| May 15, 2026 | 149 | — |
| Apr 21, 2026 | 143 | — |
| Apr 20, 2026 | 187 | — |
| Apr 19, 2026 | 234 | — |
| Apr 18, 2026 | 337 | — |
| Apr 17, 2026 | 579 | — |
| Apr 16, 2026 | 1,370 | — |
| Apr 15, 2026 | 262 | — |
| Apr 14, 2026 | 194 | — |
| Apr 13, 2026 | 227 | — |
| Apr 12, 2026 | 244 | — |
| Apr 11, 2026 | 196 | — |
| Apr 10, 2026 | 242 | — |
| Apr 9, 2026 | 307 | — |
| Apr 8, 2026 | 466 | — |
| Apr 7, 2026 | 739 | — |
| Apr 6, 2026 | 1,700 | — |
Station Information
- USGS Site No
- 04200500
- State
- OH
- County
- Lorain County
- Coordinates
- 41.3803, -82.1046
- Drainage Area
- 396 mi²
- Datum (ft)
- 620.1
- HUC Code
- 04110001
Flood Stage Thresholds
- Action Stage
- 7.0 ft
- Flood Stage
- 9.5 ft
- Moderate Flood
- 17.0 ft
- Major Flood
- 20.0 ft
Currently 7.99 ft below flood stage.
Recent Extremes
- Max discharge
-
8,430 cfsApr 2, 2026
- Min discharge
-
6 cfsSep 18, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Plum Creek Near Olmsted Falls OHNormal9.6 mi · 2 cfs
-
Unnamed Tributary To West B Rocky River Near Olmsted Falls OHUnknown10.1 mi · 0 cfs
-
West Branch Rocky River at West View OHNormal10.6 mi · 51 cfs
-
Baker Creek at Olmsted Falls OHUnknown10.8 mi · 0 cfs
-
Vermilion River Near Vermilion OHHigh11.0 mi · 151 cfs