Grays Harbor HUC8 17100105
A 1,521 km² sub-basin of the Pacific Northwest region in WA. 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
59
Moderate
Drought index
21
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
100%
of 1 reporting
Median flow
15%
p10 of record
Water assets
290
12 springs · 260 wells
USGS gauges (1)
- HUMPTULIPS RIVER BELOW HWY 101 NR HUMPTULIPS, WA12039005166 cfsp10 · below normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-19 | 21 | 0 | 1/1 | p10 |
| 2026-10-18 | 21 | 0 | 1/1 | p14 |
| 2026-10-17 | 21 | 0 | 1/1 | p15 |
| 2026-10-16 | 21 | 0 | 1/1 | p16 |
| 2026-10-15 | 21 | 0 | 1/1 | p20 |
| 2026-10-14 | 21 | 0 | 1/1 | p21 |
| 2026-10-13 | 21 | 0 | 0/1 | p26 |
| 2026-10-12 | 21 | 0 | 0/1 | p28 |
| 2026-10-11 | 21 | 0 | 0/1 | p29 |
| 2026-10-10 | 21 | 0 | 0/1 | p30 |
| 2026-10-09 | 21 | 0 | 0/1 | p34 |
| 2026-10-08 | 21 | 0 | 0/1 | p41 |
| 2026-10-07 | 21 | 0 | 0/1 | p48 |
| 2026-10-06 | 21 | 0 | 0/1 | p51 |
Top water assets
- 73Ir — Pe S2-29781spring
- 66Fp Ir — Ap S2-29554spring
- 66Fp Hp Ir — Ap S2-29433spring
- 66Fp Hp Ir — Ap S2-29435spring
- 66Ir — Ap S2-29711spring
- 66Fp Ir — Ap S2-28902spring
- 66Fp Ir — Ap S2-28447spring
- 66Fp Hp Ir — Ap S2-30309spring
- 65Swano Lake Damreservoir
- 65Humptulips River Below Hwy 101 Nr Humptulips, Wariver