Waterlands
Tualatin River
USGS · 14207500
TUALATIN RIVER
USGS · 14207500LIVE

TUALATIN RIVER AT WEST LINN, OR

WEST LINN, OR45.3507°N, -122.6762°W Updated 9 min ago
FLOW RATE
224cfs
GAUGE HT
2.93ft
Flow Rate Historical Avg
MEDIAN FLOW RATE · 1 DAY
224cfs 10.2% vs avg
Optimal band: 206278 cfs
PERIOD HIGH
258cfs
PERIOD LOW
221cfs
RUNNABLE
100%
last 1 day in band

Gauge Height

2.93ft
Precipitation History

Precipitation · YTD

Normal

Near-normal year

2026 to date

24.6in

≈ normal

24.64 in of precipitation so far this year — about average for this point in the season (normal 26.42 in).

YTD Total

24.6in

This year so far

Normal to Date

26.4in

30-yr average

Typical Range

18.3–34.7in

10th–90th pct YTD

Departure

-7%

vs 30-yr normal

By Month

This year
Typical range
Normal
Jan: 3.84" · normal 6.69" (3.4–9.5)
Jan
Feb: 6.86" · normal 5.19" (2.6–8.1)
Feb
Mar: 6.30" · normal 5.58" (3.1–8.4)
Mar
Apr: 4.02" · normal 4.35" (2.4–6.3)
Apr
May: 1.47" · normal 2.74" (1.0–4.5)
May
Jun: 2.15" · normal 1.68" (1.0–3.0)
Jun
Jul: 0.00" (so far)· normal 0.41" (0.1–0.8)
Jul
Aug: normal 0.55" (0.0–0.9)
Aug
Sep: normal 1.71" (0.1–3.7)
Sep
Oct: normal 4.15" (1.6–6.7)
Oct
Nov: normal 6.83" (3.1–9.9)
Nov
Dec: normal 7.68" (4.2–10.6)
Dec
Baseline 19912020 · Source: Open-Meteo05:12 PM
Your History · TUALATIN RIVER AT WEST LINN, OR

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Station Location

45.3507, -122.6762
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DATA · USGS · NOAA · NWSUPDATED 2026-07-09 18:00 UTC
Site #14207500·USGS

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