St. Joe HUC8 17010304
A 4,781 km² sub-basin of the Pacific Northwest region in 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
45
Stressed
Drought index
243
Severe
Area in D2+
57.93%
0% exceptional (D4)
Gauges below normal
100%
of 4 reporting
Median flow
70%
p14 of record
Water assets
1,168
12 springs · 127 wells
USGS gauges (4)
- St Joe River at Red Ives Ranger Station, ID1241387547 cfsp8 · much below normal
- ST MARIES RIVER NR SANTA, ID1241490041 cfsp9 · much below normal
- ST JOE RIVER AT RAMSDELL NR ST MARIES ID12415135386 cfsp18 · below normal
- ST JOE RIVER AT CALDER, ID12414500341 cfsp19 · below normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-21 | 243 | 57.93 | 4/4 | p14 |
| 2026-10-20 | 243 | 57.93 | 4/4 | p14 |
| 2026-10-19 | 243 | 57.93 | 4/4 | p16 |
| 2026-10-18 | 243 | 57.93 | 4/4 | p14 |
| 2026-10-17 | 243 | 57.93 | 4/4 | p13 |
| 2026-10-16 | 243 | 57.93 | 4/4 | p13 |
| 2026-10-15 | 243 | 57.93 | 3/4 | p14 |
| 2026-10-14 | 243 | 57.93 | 2/4 | p19 |
| 2026-10-13 | 243 | 57.93 | 3/4 | p14 |
| 2026-10-12 | 243 | 57.93 | 4/4 | p15 |
| 2026-10-11 | 243 | 57.93 | 3/4 | p13 |
| 2026-10-10 | 243 | 57.93 | 3/4 | p10 |
| 2026-10-09 | 243 | 57.93 | 3/4 | p15 |
| 2026-10-08 | 245 | 57.93 | 3/4 | p17 |
Top water assets
- 69Saint Joe Riverriver
- 69Yankee Bar Creekriver
- 69Tinear Creekriver
- 69Homestead Creekriver
- 69Bedrock Creekriver
- 69Sherlock Creekriver
- 69Homestead Creekriver
- 69Heller Creekriver
- 69Copper Creekriver
- 67St Joe River At Red Ives Ranger Station, Idriver