Rivermatics

3 USGS Streamgages · Snohomish River system

Sf Snoqualmie River flows and levels

Sf Snoqualmie River is gauged at 3 USGS streamgages in Washington, each tracked by Rivermatics. It feeds the South Fork Snoqualmie River. It drains into the Snohomish River system. Drainage area at the gauges ranges from 42 square miles at SF Snoqualmie River Ab Alice Creek near Garcia, WA up to 82 at SF Snoqualmie River at North Bend, WA. The gauged reach falls about 1,021 feet, from 1,454 feet down to 433. Rivermatics issues a daily machine-learned 14-day flow outlook for every one of them.

Gauges on this river, upstream to downstream

Ordered by drainage area, which is how far down the river each gauge sits. April and July figures are long-term median daily flows for that month from the USGS record — historical normals, not a forecast and not today's reading.

USGS streamgages on this river, ordered upstream to downstream
Gauge State Drainage sq mi Elevation ft April p50 cfs July p50 cfs Forecast
SF Snoqualmie River Ab Alice Creek near Garcia, WA WA 42 1,454 328.3 113.3 14-day
SF Snoqualmie River at Edgewick, WA WA 66 592 490.1 152.4 14-day
SF Snoqualmie River at North Bend, WA WA 82 433 630.5 269.8 14-day

Typical flow by month at SF Snoqualmie River at North Bend, WA

The furthest-downstream gauge on this river, so the fullest flow it carries here. Long-term daily discharge percentiles from the USGS record (up to 119 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.

Historical monthly discharge percentiles in cubic feet per second
Month Low p10 Typical p50 High p90 Range
January 244.9 518.5 1,423.9
February 248.4 469.2 1,088.2
March 292.4 498.8 1,015.3
April 398.9 630.5 1,072.7
May 489.9 788.8 1,331.3
June 316.8 644.9 1,213.7
July 167.3 269.8 608.5
August 105.3 151.7 250.5
September 90.7 133.6 287.1
October 107.8 220.3 690.7
November 210.9 464.6 1,266.3
December 240.6 480.9 1,321

All values in cubic feet per second (cfs).

Common questions

When does the Sf Snoqualmie River run highest?
May, on the long-term record at SF Snoqualmie River at North Bend, WA — the furthest-downstream gauge Rivermatics tracks on this river. Median daily flow there is about 788.8 cfs that month, against 133.6 cfs in September, the lowest. Upstream gauges peak on their own schedule; the table on this page gives April and July for each.
How many gauges are on the Sf Snoqualmie River?
Rivermatics tracks 3 USGS streamgages on the Sf Snoqualmie River, across Washington. Each has its own page with the site's full flow record and monthly normals. The river may carry other gauges that publish neither daily values nor discharge statistics; those are not tracked here.
Is there a flow forecast for the Sf Snoqualmie River?
Yes, at 3 of the 3 gauges. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on each basin's observed flows, weather and snowpack, and issues a daily outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on each gauge's live screen.
What river system is the Sf Snoqualmie River part of?
The Sf Snoqualmie River drains into the Snohomish River system — it is a tributary somewhere in that chain, following the flowpath down to its terminal river. Rivermatics builds this from the USGS/geoconnex reference-mainstem network rather than from names.
Can I use Sf Snoqualmie River data for flood or safety decisions?
No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.

Other rivers in the Snohomish River system

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