Yaak HUC8 17010103
A 2,051 km² sub-basin of the Pacific Northwest region in CN, ID, MT. 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
55
Moderate
Drought index
31
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
100%
of 1 reporting
Median flow
56%
p9 of record
Water assets
203
1 springs · 1 wells
USGS gauges (1)
- Yaak River near Troy MT1230450082 cfsp9 · much below normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-19 | 31 | 0 | 1/1 | p9 |
| 2026-10-18 | 31 | 0 | 1/1 | p9 |
| 2026-10-17 | 31 | 0 | 1/1 | p9 |
| 2026-10-16 | 31 | 0 | 1/1 | p10 |
| 2026-10-15 | 31 | 0 | 1/1 | p10 |
| 2026-10-14 | 31 | 0 | 1/1 | p10 |
| 2026-10-13 | 31 | 0 | 1/1 | p11 |
| 2026-10-12 | 31 | 0 | 1/1 | p10 |
| 2026-10-11 | 31 | 0 | 1/1 | p10 |
| 2026-10-10 | 31 | 0 | 1/1 | p9 |
| 2026-10-09 | 31 | 0 | 1/1 | p10 |
| 2026-10-08 | 73 | 0 | 1/1 | p10 |
| 2026-10-07 | 73 | 0 | 1/1 | p10 |
| 2026-10-06 | 73 | 0 | 1/1 | p10 |
Top water assets
- 67Arbo Creekriver
- 67Yaak Riverriver
- 67Yaak Riverriver
- 67East Fork Yaak Riverriver
- 67North Fork Seventeenmile Creekriver
- 67West Fork Yaak Riverriver
- 67Yaak Riverriver
- 67Spread Creekriver
- 67Gilnockie Creekriver
- 67Ward Creekriver