Big Horn Lake HUC8 10080010
A 4,675 km² sub-basin of the Missouri region in MT, WY. 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
39
Stressed
Drought index
263
Severe
Area in D2+
60.15%
0% exceptional (D4)
Gauges below normal
100%
of 1 reporting
Median flow
50%
p8 of record
Water assets
1,477
51 springs · 60 wells
USGS gauges (2)
- BIGHORN RIVER AT KANE, WY06279500800 cfsp8 · much below normal
- Shell Creek above Shell Reservoir, WY0627830012 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-22 | 263 | 60.15 | 1/1 | p8 |
| 2026-10-21 | 263 | 60.15 | 1/1 | p8 |
| 2026-10-20 | 263 | 60.15 | 1/1 | p9 |
| 2026-10-19 | 263 | 60.15 | 1/1 | p10 |
| 2026-10-18 | 263 | 60.15 | 1/1 | p10 |
| 2026-10-17 | 263 | 60.15 | 1/1 | p10 |
| 2026-10-16 | 263 | 60.15 | 1/1 | p10 |
| 2026-10-15 | 300 | 96.39 | 1/1 | p19 |
| 2026-10-14 | 300 | 96.39 | 1/1 | p16 |
| 2026-10-13 | 300 | 96.39 | 1/1 | p19 |
| 2026-10-12 | 300 | 96.39 | 1/1 | p23 |
| 2026-10-11 | 300 | 96.39 | 1/1 | p9 |
| 2026-10-10 | 300 | 96.39 | 1/1 | p7 |
| 2026-10-09 | 300 | 96.39 | 1/1 | p8 |
Top water assets
- 69Dry Fork Horse Creekriver
- 69Porcupine Creekriver
- 69Willey Creekriver
- 69Shell Creekriver
- 69Shell Creek Above Shell Creek Reservoir, Wyriver
- 69Bear Creekriver
- 69Battle Creekriver
- 69Bear Creekriver
- 69North Fork Trout Creekriver
- 69Buckley Creekriver