Rivermatics

USGS Streamgage 12409000

Colville River at Kettle Falls, WA

Colville River at Kettle Falls, WA is USGS streamgage 12409000 in Washington, monitoring river discharge in hydrologic subbasin 17020003. It drains a watershed of about 1,007 square miles. Discharge records at this site go back to 1922. Typical flow runs near 134.4 cfs in July and 701.1 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
1,007 sq mi
Gauge elevation
1,388 ft
Subbasin (HUC-8)
17020003
Coordinates
48.59435, -118.06249
USGS site number
12409000
Records begin
1922-11-01 (104 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Colville River at Kettle Falls, 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
55.5 58.9 62.5
51.6 56 61
54.9 66.6 99.9
64.4 88.5 141
63.5 86.6 131
60.8 79.7 113
57.6 73.6 99.4
54.8 69 90.6
52 65.1 83.9
50.5 63 80.2
49 61.1 77.4
48.2 60.2 76.4
46.4 58 73.3
46.1 58 73.7

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 104 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 84.8 170.1 371.9
February 116.3 234.2 534.2
March 212 411 899.7
April 305.2 701.1 1,602.7
May 218 594.1 1,247.2
June 127.6 318 665.9
July 47.2 134.4 316.5
August 30.6 80 161
September 47.1 88.2 155
October 66.2 109.9 175.8
November 87.5 140.8 236.7
December 80.5 153.7 296.7

All values in cubic feet per second (cfs).

Common questions

When does Colville River at Kettle Falls, WA normally run highest?
April, on the long-term record. The median daily flow that month is about 701.1 cfs, against 80 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 Colville River at Kettle Falls, WA?
It depends on the month. In January, half of days historically fall near 170.1 cfs, with the middle 80% of days between 84.8 and 371.9 cfs. The month-by-month table on this page gives the full range.
How long has Colville River at Kettle Falls, WA been measured?
Discharge records at USGS site 12409000 begin in 1922, about 104 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 Colville River at Kettle Falls, 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 Colville River at Kettle Falls, WA?
The gauge sits at 48.59435, -118.06249, in Washington, in hydrologic subbasin 17020003, at an elevation of about 1,388 feet, draining roughly 1,007 square miles.
Can I use Colville River at Kettle Falls, 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.

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