USGS · 14207500

TUALATIN RIVER

USGS · 14207500LIVE

TUALATIN RIVER AT WEST LINN, OR

WEST LINN, OR45.3507°N, -122.6762°W Updated 18 hr ago

FLOW RATE

238cfs

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 7 DAY

238cfs 7.4% vs avg

Optimal band: 221–299 cfs

PERIOD HIGH

264cfs

PERIOD LOW

238cfs

RUNNABLE

100%

last 7 day in band

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 1991–2020 · Source: Open-Meteo05:12 PM

Your History · TUALATIN RIVER AT WEST LINN, OR

Track your history

Station Location

45.3507, -122.6762

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DATA · USGS · NOAA · NWSUPDATED 2026-07-09 00:00 UTC

Site #14207500·USGS

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