SNOFLO
 


       

Snoqualmie River







SNOQUALMIE RIVER

RIVER LEVELS
March 2, 2025


Winter Storm Watch
2025-03-04T17:00:00-07:00

* WHAT...Heavy snow and blowing snow possible. Total snow accumulations between 4 and 12 inches possible. Wind gusts as high as 60 mph may produce significant blowing and drifting snow. * WHERE...Castle Rock, Byers, Limon, Southern Lincoln County, and Akron. * WHEN...From Monday evening through Tuesday afternoon. * IMPACTS...Snow and ice covered roads will make travel hazardous, with the possibility of very difficult or impossible travel. Visibility will be near zero at times resulting in white out conditions. Travel will be treacherous and potentially life-threatening.


TOTAL RIVER DISCHARGE

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Total streamflow across the Snoqualmie River was last observed at 6,300 cfs, and is expected to yield approximately 12,496 acre-ft of water today; about 60% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 10,509 cfs, with recent peaks last observed on 2015-01-06 when daily discharge volume was observed at 85,200 cfs.

Maximum discharge along the river is currently at the Snoqualmie River Near Carnation reporting a streamflow rate of 3,430 cfs. This is also the highest stage along the Snoqualmie River, with a gauge stage of 46.72 ft at this location. This river is monitored from 2 different streamgauging stations along the Snoqualmie River, the highest being situated at an altitude of 114 ft, the Snoqualmie River Near Snoqualmie.

The Snoqualmie River is a river in western Washington state, flowing 45 miles from the Cascade Mountains to the Snohomish River. It has been an important source of food, transportation, and cultural significance for the Snoqualmie Tribe for thousands of years. Today, the Snoqualmie River is used for hydroelectric power generation, with multiple dams and reservoirs along its course, including Snoqualmie Falls and the Snoqualmie Pass Hydroelectric Project. These reservoirs not only provide power, but also serve as recreation areas for fishing, boating, and hiking. The river is also important for agricultural purposes, with farms and orchards along its banks producing crops such as corn, hay, and apples. Despite its importance, the Snoqualmie River faces challenges such as pollution, habitat degradation, and impacts from climate change.

Last Updated 2025-03-02
Discharge Volume 12,496 ACRE-FT
Streamflow 6,300.0 cfs
-660.0 cfs (-9.48%)
Percent of Normal 59.95%
Maximum 85,200.0 cfs
2015-01-06
Seasonal Avg 10,509 cfs

YEAR OVER YEAR DISCHARGE (CFS)

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Streamflow Conditions
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Snoqualmie River Near Snoqualmie
USGS 12144500
2870 cfs 5.98 ft -4.97
Snoqualmie River Near Carnation
USGS 12149000
3430 cfs 46.72 ft -12.94
History of the River
Created with Highcharts 8.0.0Annual Peak Discharge(cfs)20102012201420162018202020222024202620k40k60k80k100k

The Snoqualmie River is a 45-mile (72 km) long river in King County and Snohomish County in the U.S. state of Washington. The river's three main tributaries are the North, Middle, and South Forks, which drain the west side of the Cascade Mountains near the town of North Bend and join near the town of Snoqualmie just above the Snoqualmie Falls. After the falls the river flows north through rich farmland and the towns of Fall City, Carnation, and Duvall before meeting the Skykomish River to form the Snohomish River near Monroe. The Snohomish River empties into Puget Sound at Everett. Other tributaries of the Snoqualmie River include the Taylor River and the Pratt River, both of which enter the Middle Fork, the Tolt River, which joins at Carnation, and the Raging River at Fall City.
Many of the Snoqualmie River's headwaters originate as snowmelt within the Alpine Lakes Wilderness. On August 8, 2007, U.S. Representative Dave Reichert (WA-08), King County Executive Ron Sims, and others announced a proposal to expand the Alpine Lakes Wilderness to include the valley of the Pratt River, a tributary of the Middle Fork, near the town of North Bend. The proposal would also give the Pratt River National Wild and Scenic River status.

Weather Forecast

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Regional Streamflow Levels