Black-Rocky HUC8 04110001
A 2,317 km² sub-basin of the Great Lakes region in OH. Drought coverage is from the US Drought Monitor (map of 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
84
Healthy
Drought index
10
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 5 reporting
Median flow
50%
p31 of record
Water assets
449
4 springs · 73 wells
USGS gauges (9)
- East Branch Rocky River near Strongsville OH0420148417 cfsp28 · normal
- West Branch Rocky River at West View OH0420140030 cfsp31 · normal
- Plum Creek near Olmsted Falls OH042014231 cfsp31 · normal
- Rocky River near Berea OH0420150072 cfsp66 · normal
- Black River at Elyria OH0420050058 cfsp79 · above normal
- Baker Creek at Olmsted Falls OH04201404no readingno long-term record
- Unnamed Tributary to W B Rocky R near Berea OH04201409no readingno long-term record
- Unnamed Trib to W B Rocky R near Olmsted Falls OH04201429no readingno long-term record
- Baldwin Creek at Strongsville OH04201495no readingno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-21 | 10 | 0 | 0/5 | p31 |
| 2026-10-20 | 10 | 0 | 0/5 | p32 |
| 2026-10-19 | 10 | 0 | 0/5 | p76 |
| 2026-10-18 | 10 | 0 | 0/5 | p89 |
| 2026-10-17 | 10 | 0 | 0/5 | p93 |
| 2026-10-16 | 10 | 0 | 0/5 | p54 |
| 2026-10-15 | 10 | 0 | 0/5 | p65 |
| 2026-10-14 | 10 | 0 | 0/5 | p33 |
| 2026-10-13 | 10 | 0 | 0/5 | p43 |
| 2026-10-12 | 10 | 0 | 0/5 | p52 |
| 2026-10-11 | 10 | 0 | 2/5 | p27 |
| 2026-10-10 | 10 | 0 | 2/5 | p26 |
| 2026-10-09 | 10 | 0 | 3/5 | p18 |
| 2026-10-08 | 0 | 0 | 3/5 | p21 |
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