Snoqualmie HUC8 17110010
A 1,789 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
50
Moderate
Drought index
108
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
93%
of 15 reporting
Median flow
37%
p9 of record
Water assets
1,600
260 springs · 661 wells
USGS gauges (17)
- RAGING RIVER NEAR FALL CITY, WA1214550010 cfsp7 · much below normal
- SF SNOQUALMIE RIVER AB ALICE CREEK NEAR GARCIA, WA1214340028 cfsp8 · much below normal
- SF SNOQUALMIE RIVER AT EDGEWICK, WA1214360051 cfsp8 · much below normal
- SNOQUALMIE RIVER NEAR SNOQUALMIE, WA12144500460 cfsp9 · much below normal
- SOUTH FORK TOLT RIVER NEAR INDEX, WA121476006 cfsp9 · much below normal
- SF TOLT RIVER BL REGULATING BASIN NR CARNATION, WA1214830060 cfsp9 · much below normal
- SNOQUALMIE RIVER NEAR CARNATION, WA12149000601 cfsp9 · much below normal
- SF SNOQUALMIE RIVER AT NORTH BEND, WA12144000101 cfsp9 · much below normal
- MIDDLE FORK SNOQUALMIE RIVER NEAR TANNER, WA12141300162 cfsp9 · much below normal
- TOLT RIVER NEAR CARNATION, WA12148500124 cfsp10 · much below normal
- BOXLEY CREEK NEAR EDGEWICK, WA1214390013 cfsp11 · below normal
- NF TOLT RIVER ABOVE YELLOW CREEK NR CARNATION, WA1214747039 cfsp15 · below normal
- NF SNOQUALMIE RIVER NEAR SNOQUALMIE FALLS, WA12142000102 cfsp16 · below normal
- SOUTH FORK TOLT RIVER NEAR CARNATION, WA1214800058 cfsp19 · below normal
- BOXLEY CREEK NEAR CEDAR FALLS, WA121437002 cfsp37 · normal
- NORTH FORK TOLT RIVER NEAR CARNATION, WA1214750069 cfsno long-term record
- PHELPS CREEK BLW UNNAMED TRIB NR INDEX, WA121476802 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-20 | 108 | 0 | 14/15 | p9 |
| 2026-10-19 | 108 | 0 | 14/15 | p10 |
| 2026-10-18 | 108 | 0 | 12/15 | p13 |
| 2026-10-17 | 108 | 0 | 14/15 | p9 |
| 2026-10-16 | 108 | 0 | 14/15 | p9 |
| 2026-10-15 | 108 | 0 | 14/15 | p12 |
| 2026-10-14 | 108 | 0 | 13/15 | p14 |
| 2026-10-13 | 108 | 0 | 10/15 | p20 |
| 2026-10-12 | 108 | 0 | 6/15 | p27 |
| 2026-10-11 | 108 | 0 | 2/15 | p34 |
| 2026-10-10 | 108 | 0 | 4/15 | p32 |
| 2026-10-09 | 108 | 0 | 14/15 | p11 |
| 2026-10-08 | 108 | 0 | 12/15 | p14 |
| 2026-10-07 | 108 | 0 | 12/15 | p17 |
Top water assets
- 76Fs — Ce S1-25151Cwrisspring
- 76Ci Mu — Ap S1-*04254spring
- 76Ci Dm — Ce S1-*01933Cspring
- 76Ci Dm — Cp Cs1-*01933Caspring
- 76Mu — Ap S1-27877spring
- 76Ds Fs Ir — Ce S1-*13134Cwrisspring
- 76Fs — Ce S1-*21399Cwrisspring
- 76Dm Fs — Ce S1-*08944Cwrisspring
- 76Fs — Ce S1-*03416Cwrisspring
- 76Ci Mu — Ap S1-28050spring