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 2026-09-01); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
53
Moderate
Drought index
162
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
73%
of 15 reporting
Median flow
64%
p18 of record
Water assets
1,600
260 springs · 661 wells
USGS gauges (17)
- NF TOLT RIVER ABOVE YELLOW CREEK NR CARNATION, WA1214747020 cfsp8 · much below normal
- SF SNOQUALMIE RIVER AT EDGEWICK, WA1214360046 cfsp9 · much below normal
- MIDDLE FORK SNOQUALMIE RIVER NEAR TANNER, WA12141300123 cfsp9 · much below normal
- BOXLEY CREEK NEAR EDGEWICK, WA1214390018 cfsp9 · much below normal
- RAGING RIVER NEAR FALL CITY, WA121455008 cfsp10 · much below normal
- SF SNOQUALMIE RIVER AB ALICE CREEK NEAR GARCIA, WA1214340026 cfsp10 · much below normal
- SOUTH FORK TOLT RIVER NEAR INDEX, WA121476003 cfsp11 · below normal
- TOLT RIVER NEAR CARNATION, WA12148500107 cfsp18 · below normal
- NF SNOQUALMIE RIVER NEAR SNOQUALMIE FALLS, WA1214200053 cfsp20 · below normal
- SNOQUALMIE RIVER NEAR SNOQUALMIE, WA12144500407 cfsp21 · below normal
- SNOQUALMIE RIVER NEAR CARNATION, WA12149000610 cfsp22 · below normal
- SF SNOQUALMIE RIVER AT NORTH BEND, WA12144000115 cfsp33 · normal
- BOXLEY CREEK NEAR CEDAR FALLS, WA121437008 cfsp34 · normal
- SF TOLT RIVER BL REGULATING BASIN NR CARNATION, WA1214830066 cfsp37 · normal
- SOUTH FORK TOLT RIVER NEAR CARNATION, WA1214800063 cfsp71 · normal
- NORTH FORK TOLT RIVER NEAR CARNATION, WA1214750069 cfsno long-term record
- PHELPS CREEK BLW UNNAMED TRIB NR INDEX, WA121476801 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 162 | 0 | 11/15 | p18 |
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