Tualatin River at West Linn
Future / Actual / Minor
OWP 2.0 WWA Modal Title
01/11/2021, 10:04 PM UTC through 01/11/2021, 10:04 PM UTC
Sender
Sent
- Downstream gauge unavailableWarning: no valid ratings curve available. Transformations to and from FEET/CFS/KCFS will not happen.
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Observed (OBS) 06/29/2025 11:00 AM PDTOfficial Forecast (FCST) 06/29/2025 9:18 AM PDTRecord: 18.3 ftCATEGORY STAGE 
Major Flooding 15 ft Moderate Flooding 14.5 ft Minor Flooding 13.5 ft Action 11 ft Reliability of the Forecast:
NOTE: Forecasts are issued routinely year-round.
National Water Model Hydrograph
Official NWS streamflow forecasts are produced by NWS hydrologic forecasters for river gauge locations using hydrologic models which are calibrated to that location. This process considers additional guidance and information, including local expertise and experience, to produce the best forecast possible. The NWM output provides supplemental guidance to NWS forecasters and should not be considered an official NWS river forecast.
Flood Impacts
- 18 - expect 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.
- 17 - expect 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.
- 16 - expect 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.
Gauge Info
| Coordinates | 45.3508, -122.675 |
| RFC | NWRFC |
| State | OR |
| WFO | PQR |
| County | Clackamas |
| Data Provider(s) | |
| US Geological Survey | USGS--Water Resources of the United States |
| USGS | 14207500 |
Gauge Location
Recent Crests
| 1. | 13.40 ft | on 12-13-2015 |
| 2. | 13.47 ft | on 01-13-2006 |
| 3. | 14.42 ft | on 03-01-1999 |
| 4. | 16.31 ft | on 01-02-1997 |
| 5. | 18.32 ft | on 02-10-1996 |
Recent Crests
| 1. | 13.40 ft | on 12-13-2015 | |
| 2. | 13.47 ft | on 01-13-2006 | |
| 3. | 14.42 ft | on 03-01-1999 | |
| 4. | 16.31 ft | on 01-02-1997 | |
| 5. | 18.32 ft | on 02-10-1996 | |
| 6. | 14.16 ft | on 12-17-1977 | |
| 7. | 16.31 ft | on 01-18-1974 | |
| 8. | 14.18 ft | on 01-24-1972 | |
| 9. | 15.40 ft | on 01-28-1964 | |
| 10. | 16.27 ft | on 12-23-1955 | |
| 11. | 14.36 ft | on 02-20-1949 | |
| 12. | 17.29 ft | on 12-30-1937 | 1 |
| 13. | 15.30 ft | on 01-24-1936 | 1 |
| 14. | 17.72 ft | on 12-23-1933 | 1 |
Historic Crests
| 1. | 18.32 ft | on 02-10-1996 | |
| 2. | 17.72 ft | on 12-23-1933 | 1 |
| 3. | 17.29 ft | on 12-30-1937 | 1 |
| 4. | 16.31 ft | on 01-02-1997 | |
| 5. | 16.31 ft | on 01-18-1974 |
Historic Crests
| 1. | 18.32 ft | on 02-10-1996 | |
| 2. | 17.72 ft | on 12-23-1933 | 1 |
| 3. | 17.29 ft | on 12-30-1937 | 1 |
| 4. | 16.31 ft | on 01-02-1997 | |
| 5. | 16.31 ft | on 01-18-1974 | |
| 6. | 16.27 ft | on 12-23-1955 | |
| 7. | 15.40 ft | on 01-28-1964 | |
| 8. | 15.30 ft | on 01-24-1936 | 1 |
| 9. | 14.42 ft | on 03-01-1999 | |
| 10. | 14.36 ft | on 02-20-1949 | |
| 11. | 14.18 ft | on 01-24-1972 | |
| 12. | 14.16 ft | on 12-17-1977 | |
| 13. | 13.47 ft | on 01-13-2006 | |
| 14. | 13.40 ft | on 12-13-2015 |
Unique Local Info
Collaborative Agencies
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
Resources
Hydrologic Resource Links
- River Forecast Centers
- Text Products
- Past Precipitation
- Forecast Precipitation
- Text Table Temp & Precip Forecasts
- 3-Day Detailed Precip Forecast
- 10-Day Temp & Precip Outlook
- Lewis Dams - USGS data (scroll down to Lewis basin)
- Lewis Reservoirs Summary
- Lower Columbia Reservoir and River conditions
- USACE DataQuery
- USGS WaterWatch Oregon
- USGS WaterWatch Washington
- USGS River Temperatures & Water Quality Oregon
- USGS River Temperatures & Water Quality Washington
- Oregon Water Resources Dept - Surface Water Data
- USGS Oregon river levels
- USGS Washington river levels