Rivermatics

USGS Streamgage 12113349

Mill Creek near Mouth at Orillia, WA

Mill Creek near Mouth at Orillia, WA is USGS streamgage 12113349 in Washington, monitoring river discharge in hydrologic subbasin 17110013. It drains a watershed of about 6 square miles. Discharge records at this site go back to 1994. Typical flow runs near 1.8 cfs in July and 9.9 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
6 sq mi
Gauge elevation
22 ft
Subbasin (HUC-8)
17110013
Coordinates
47.4301, -122.24318
USGS site number
12113349
Records begin
1994-02-25 (32 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Mill Creek near Mouth at Orillia, 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
0.7 0.8 1
0.6 0.8 1
2.7 8.5 26.4
1 2.7 7.8
0.8 1.6 4
0.6 1.2 2.5
0.5 0.9 2
0.4 0.8 1.6
0.4 0.7 1.5
0.4 0.8 1.4
0.4 0.7 1.3
0.3 0.7 1.2
0.3 0.6 1.2
0.3 0.6 1.2

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 32 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 6.7 22 72.8
February 5.6 17.9 58
March 6.1 15.6 51
April 4 9.9 33.3
May 2.2 5.8 20.1
June 1.6 3.8 14.9
July 0.7 1.8 6.4
August 0.2 1.4 6.5
September 0.3 1.7 13.7
October 1.2 5.3 35.8
November 3.8 17.1 63.9
December 5.7 20.8 69.6

All values in cubic feet per second (cfs).

Common questions

When does Mill Creek near Mouth at Orillia, WA normally run highest?
January, on the long-term record. The median daily flow that month is about 22 cfs, against 1.4 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 Mill Creek near Mouth at Orillia, WA?
It depends on the month. In January, half of days historically fall near 22 cfs, with the middle 80% of days between 6.7 and 72.8 cfs. The month-by-month table on this page gives the full range.
How long has Mill Creek near Mouth at Orillia, WA been measured?
Discharge records at USGS site 12113349 begin in 1994, about 32 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 Mill Creek near Mouth at Orillia, 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 Mill Creek near Mouth at Orillia, WA?
The gauge sits at 47.4301, -122.24318, in Washington, in hydrologic subbasin 17110013, at an elevation of about 22 feet, draining roughly 6 square miles.
Can I use Mill Creek near Mouth at Orillia, 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.

Other gauges in this subbasin