Rivermatics

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 sits on the Snoqualmie River, alongside 2 other gauges Rivermatics tracks on the same river. 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. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.

View live conditions & forecast →

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)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Snoqualmie River near Snoqualmie, WA. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.

Forecast daily mean discharge in cubic feet per second, by date
Date Low p10 Expected p50 High p90 Range
321 335 347
320 337 358
394 546 933
489 760 1,246
436 594 873
398 490 645
368 434 548
348 405 503
338 389 476
323 372 450
314 361 435
305 351 422
297 341 406
291 337 405

All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.

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.

Historical monthly discharge percentiles in cubic feet per second
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).

Common questions

When does Snoqualmie River near Snoqualmie, WA normally run highest?
May, on the long-term record. The median daily flow that month is about 3,468.1 cfs, against 602.9 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Snoqualmie River near Snoqualmie, WA?
It depends on the month. In January, half of days historically fall near 2,433.5 cfs, with the middle 80% of days between 1,139.9 and 7,678.4 cfs. The month-by-month table on this page gives the full range.
How long has Snoqualmie River near Snoqualmie, WA been measured?
Discharge records at USGS site 12144500 begin in 1898, about 128 years, covering roughly 9,200 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Snoqualmie River near Snoqualmie, WA?
Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow 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 the live gauge screen. Open live conditions to see the current outlook.
Where is Snoqualmie River near Snoqualmie, WA?
The gauge sits at 47.54508, -121.84232, in Washington, in hydrologic subbasin 17110010, at an elevation of about 111 feet, draining roughly 375 square miles.
Can I use Snoqualmie River near Snoqualmie, WA 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.

Upstream and downstream on the Snoqualmie River

Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Snoqualmie River in full.

Other gauges in this subbasin