Flathead Lake HUC8 17010208
A 3,084 km² sub-basin of the Pacific Northwest region in 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
81
Healthy
Drought index
0
None
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 1 reporting
Median flow
92%
p27 of record
Water assets
934
7 springs · 661 wells
USGS gauges (1)
- Flathead River at Columbia Falls MT123630003,660 cfsp27 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-20 | 0 | 0 | 0/1 | p27 |
| 2026-10-19 | 0 | 0 | 1/1 | p24 |
| 2026-10-18 | 0 | 0 | 1/1 | p24 |
| 2026-10-17 | 0 | 0 | 1/1 | p24 |
| 2026-10-16 | 0 | 0 | 1/1 | p25 |
| 2026-10-15 | 0 | 0 | 0/1 | p30 |
| 2026-10-14 | 0 | 0 | 0/1 | p26 |
| 2026-10-13 | 0 | 0 | 1/1 | p24 |
| 2026-10-12 | 0 | 0 | 1/1 | p25 |
| 2026-10-11 | 0 | 0 | 1/1 | p24 |
| 2026-10-10 | 0 | 0 | 0/1 | p27 |
| 2026-10-09 | 0 | 0 | 0/1 | p33 |
| 2026-10-08 | 0 | 0 | 0/1 | p25 |
| 2026-10-07 | 0 | 0 | 0/1 | p34 |
Top water assets
- 69Parker Creekriver
- 69Yellow Bay Creekriver
- 67Wild Bill Creekriver
- 67Selis Ksanka Qlispe (Skq)reservoir
- 67Ashley Creekriver
- 67Flathead Riverriver
- 67Patrick Creekriver
- 67Flathead River At Columbia Falls Mtriver
- 67Abbot Creekriver
- 67Big Lost Creekriver