Lower Cowlitz HUC8 17080005
A 3,757 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
58
Moderate
Drought index
92
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
67%
of 6 reporting
Median flow
47%
p8 of record
Water assets
3,258
65 springs · 1,330 wells
USGS gauges (6)
- COWLITZ RIVER NEAR KOSMOS, WA14233500460 cfsp6 · much below normal
- NF TOUTLE RIVER BELOW SRS NEAR KID VALLEY, WA14240525140 cfsp7 · much below normal
- TILTON RIVER AB BEAR CANYON CREEK NEAR CINEBAR, WA1423620052 cfsp8 · much below normal
- TOUTLE RIVER AT TOWER ROAD NEAR SILVER LAKE, WA14242580294 cfsp9 · much below normal
- COWLITZ RIVER AT CASTLE ROCK, WA142430004,070 cfsp47 · normal
- COWLITZ RIVER BELOW MAYFIELD DAM, WA142380003,540 cfsp49 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-20 | 92 | 0 | 4/6 | p8 |
| 2026-10-19 | 92 | 0 | 4/6 | p9 |
| 2026-10-18 | 92 | 0 | 4/6 | p9 |
| 2026-10-17 | 92 | 0 | 4/6 | p9 |
| 2026-10-16 | 92 | 0 | 4/6 | p9 |
| 2026-10-15 | 92 | 0 | 4/6 | p9 |
| 2026-10-14 | 92 | 0 | 4/6 | p12 |
| 2026-10-13 | 92 | 0 | 4/6 | p10 |
| 2026-10-12 | 92 | 0 | 4/6 | p12 |
| 2026-10-11 | 92 | 0 | 4/6 | p16 |
| 2026-10-10 | 92 | 0 | 4/6 | p12 |
| 2026-10-09 | 92 | 0 | 4/6 | p9 |
| 2026-10-08 | 92 | 0 | 4/6 | p10 |
| 2026-10-07 | 92 | 0 | 4/6 | p11 |
Top water assets
- 76Po — Pe S2-*06948spring
- 76Fs — Ap S2-29644spring
- 73Ir — Ap S2-29108spring
- 73Dm — Ap S2-29058spring
- 67Trouble Creekriver
- 67Shultz Creekriver
- 67Shultz Creekriver
- 67Cowlitz Fallsreservoir
- 67Mayfieldreservoir
- 67Castle Creekriver