Tualatin River at West Linn

1. 18.00 ftexpect major widespread flooding of homes and structures from the City of Tualatin downstream to the confluence with the Willamette, along with numerous road closures. Also expect major flooding of homes and boat houses around Lake Oswego and along the Oswego Canal.
2. 17.00 ftexpect flooding of numerous homes and structures along the Tualatin River upstream of the City of Tualatin down to the confluence with the Willamette, including flooding of homes in the Rivergrove area just east of I-5. Also expect overtopping of the Oswego Canal inlet gate and flooding along the Oswego Canal. The Oswego lake surface will begin rising even with all lake outlets fully opened.
3. 16.00 ftexpect flooding of numerous homes and structures along the Tualatin River upstream of the City of Tualatin down to the confluence with the Willamette, along with flooding of homes in the Rivergrove area just east of I-5. Overtopping of the Oswego Canal inlet gate is possible at this level, which would lead to some erosion of the canal banks.
4. 15.00 ftexpect flooding of homes and other structures to begin along the Tualatin River from upstream of the City of Tualatin down to the confluence with the Willamette. Also expect several road closures in the area.
5. 14.50 ftthe Oswego canal inlet gate will likely be overtopped. Expect several road closures in the area. Flooding of homes and other structures along the Tualatin River from upstream of the City of Tualatin down to the confluence with the Willamette will also begin.
6. 13.50 ftexpect lowland flooding. Numerous secondary roads upstream of Tualatin are likely to be closed, and low-lying structures along the Tualatin from the City of Tualatin downstream to the confluence with the Willamette are threatened by flood waters.
7. 11.00 ftsome localized lowland flooding is possible.

Most recent crests

• December 13, 2015: 13.40 ft
• January 13, 2006: 13.47 ft
• March 1, 1999: 14.42 ft
• January 2, 1997: 16.31 ft
• February 10, 1996: 18.32 ft
• December 17, 1977: 14.16 ft
• January 18, 1974: 16.31 ft
• January 24, 1972: 14.18 ft
• January 28, 1964: 15.40 ft
• December 23, 1955: 16.27 ft

• UpstreamTualatin River at Tualatin
• Willamette River at Falls at Oregon City
• Willamette River at Falls at Oregon City
• Willamette River at Canby Ferry near Canby
• Clackamas River at Oregon City
• Fanno Creek at Durham
• Tryon Creek at Lake Oswego
• Kellogg Creek at Milwaukie

Forecasts by the Northwest River Forecast Center. Forecasts are issued routinely year-round.

Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.