Rivermatics

USGS Streamgage 12143400

SF Snoqualmie River Ab Alice Creek near Garcia, WA

SF Snoqualmie River Ab Alice Creek near Garcia, WA is USGS streamgage 12143400 in Washington, monitoring river discharge in hydrologic subbasin 17110010. It sits on the Sf Snoqualmie River, alongside 2 other gauges Rivermatics tracks on the same river. It drains a watershed of about 42 square miles. Discharge records at this site go back to 1960. Typical flow runs near 113.3 cfs in July and 328.3 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.

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Gauge details

State
Washington
Drainage area
42 sq mi
Gauge elevation
1,454 ft
Subbasin (HUC-8)
17110010
Coordinates
47.41511, -121.58732
USGS site number
12143400
Records begin
1960-10-01 (66 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for SF Snoqualmie River Ab Alice Creek near Garcia, 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
21.6 22.5 23.4
21.6 22.9 24.7
27.6 46.5 112
31.3 53.3 108
27.5 37.9 59.2
25.5 31.3 42
23.6 27.8 35.2
22.6 26.2 32.1
21.9 25 30
21.1 24.2 28.8
20.5 23.4 27.6
20.1 22.9 26.9
19.6 22.5 26.3
19.2 22 25.7

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 66 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 93.6 216.5 783.5
February 93.2 202.3 643.8
March 116.7 216.8 504.6
April 186.7 328.3 685.3
May 278.1 488.8 914.3
June 173.8 359.2 785.5
July 63.2 113.3 377.4
August 32.5 47.5 116.6
September 27.3 46 168.2
October 35.9 113.5 428.3
November 100.6 259.9 807.9
December 102.4 214.1 766.5

All values in cubic feet per second (cfs).

Common questions

When does SF Snoqualmie River Ab Alice Creek near Garcia, WA normally run highest?
May, on the long-term record. The median daily flow that month is about 488.8 cfs, against 46 cfs in September, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for SF Snoqualmie River Ab Alice Creek near Garcia, WA?
It depends on the month. In January, half of days historically fall near 216.5 cfs, with the middle 80% of days between 93.6 and 783.5 cfs. The month-by-month table on this page gives the full range.
How long has SF Snoqualmie River Ab Alice Creek near Garcia, WA been measured?
Discharge records at USGS site 12143400 begin in 1960, about 66 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 SF Snoqualmie River Ab Alice Creek near Garcia, 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 SF Snoqualmie River Ab Alice Creek near Garcia, WA?
The gauge sits at 47.41511, -121.58732, in Washington, in hydrologic subbasin 17110010, at an elevation of about 1,454 feet, draining roughly 42 square miles.
Can I use SF Snoqualmie River Ab Alice Creek near Garcia, 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 Sf Snoqualmie River

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

Other gauges in this subbasin