Rivermatics

USGS Streamgage 14211315

Tryon Creek near Lake Oswego, OR

Tryon Creek near Lake Oswego, OR is USGS streamgage 14211315 in Oregon, monitoring river discharge in hydrologic subbasin 17090012. It drains a watershed of about 6 square miles. Discharge records at this site go back to 2001. Typical flow runs near 1.1 cfs in July and 7.2 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
Oregon
Drainage area
6 sq mi
Subbasin (HUC-8)
17090012
Coordinates
45.43067, -122.67371
USGS site number
14211315
Records begin
2001-08-01 (25 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Tryon Creek near Lake Oswego, OR. 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
0.3 0.4 0.5
0.3 0.5 1.3
0.3 0.5 1.5
0.3 0.4 0.7
0.3 0.4 0.6
0.2 0.4 0.8
0.2 0.4 1.2
0.2 0.4 2.2
0.2 0.4 1.5
0.2 0.4 1
0.2 0.4 0.9
0.2 0.4 0.9
0.2 0.4 1.5
0.2 0.4 1.7

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 24 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 4.4 12.1 53.9
February 3.2 8.5 39.9
March 3.4 9.6 38.2
April 2.6 7.2 23.1
May 1.5 3.4 13.9
June 1 1.9 8.7
July 0.6 1.1 2
August 0.4 0.8 1.7
September 0.3 0.8 5
October 0.6 1.6 12.4
November 1.6 5.9 32
December 2.4 10.3 55.8

All values in cubic feet per second (cfs).

Common questions

When does Tryon Creek near Lake Oswego, OR normally run highest?
January, on the long-term record. The median daily flow that month is about 12.1 cfs, against 0.8 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 Tryon Creek near Lake Oswego, OR?
It depends on the month. In January, half of days historically fall near 12.1 cfs, with the middle 80% of days between 4.4 and 53.9 cfs. The month-by-month table on this page gives the full range.
How long has Tryon Creek near Lake Oswego, OR been measured?
Discharge records at USGS site 14211315 begin in 2001, about 25 years, covering roughly 9,133 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Tryon Creek near Lake Oswego, OR?
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 Tryon Creek near Lake Oswego, OR?
The gauge sits at 45.43067, -122.67371, in Oregon, in hydrologic subbasin 17090012, draining roughly 6 square miles.
Can I use Tryon Creek near Lake Oswego, OR 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