USGS Streamgage 12144500
Snoqualmie River near Snoqualmie, WA
Snoqualmie River near Snoqualmie, WA is USGS streamgage 12144500 in Washington, monitoring river discharge in hydrologic subbasin 17110010. It drains a watershed of about 375 square miles. Discharge records at this site go back to 1898. Typical flow runs near 1,322.3 cfs in July and 2,625.7 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Washington
- Drainage area
- 375 sq mi
- Gauge elevation
- 111 ft
- Subbasin (HUC-8)
- 17110010
- Coordinates
- 47.54508, -121.84232
- USGS site number
- 12144500
- Records begin
- 1898-05-01 (128 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 67 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 1,139.9 | 2,433.5 | 7,678.4 | |
| February | 1,124.5 | 2,098.6 | 5,691.7 | |
| March | 1,202.3 | 2,117.1 | 4,476.1 | |
| April | 1,665 | 2,625.7 | 4,954.3 | |
| May | 2,184.2 | 3,468.1 | 6,098.7 | |
| June | 1,649.3 | 3,050.7 | 5,681 | |
| July | 815.3 | 1,322.3 | 3,219.4 | |
| August | 434.6 | 602.9 | 1,451.3 | |
| September | 367.9 | 614.1 | 2,027.7 | |
| October | 463.5 | 1,251 | 4,313.9 | |
| November | 1,046.7 | 2,517 | 7,572.3 | |
| December | 1,168.1 | 2,380.3 | 6,960.6 |
All values in cubic feet per second (cfs).
Other gauges in this subbasin
- Raging River near Fall City, WA
- NF Tolt River above Yellow Creek near Carnation, WA
- North Fork Tolt River near Carnation, WA
- South Fork Tolt River near Index, WA
- Phelps Creek below Unnamed Tributary near Index, WA
- South Fork Tolt River near Carnation, WA
- SF Tolt River below Regulating Basin near Carnation, WA
- Tolt River near Carnation, WA