Willamette River at Corvallis
Future / Actual / Minor
OWP 2.0 WWA Modal Title
01/11/2021, 10:04 PM UTC through 01/11/2021, 10:04 PM UTC
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Observed (OBS) 04/03/2025 7:15 AM PDTOfficial Forecast (FCST) 04/02/2025 3:39 PM PDTRecord: 42.4 ftCATEGORY STAGE 
Major Flooding 36 ft Moderate Flooding 33 ft Minor Flooding 30 ft Action 26 ft Reliability of the Forecast: Based on current and forecast river, weather and reservoir conditions
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
- 36 - expect widespread flooding, with serious flooding possible between Corvallis and Albany on the west bank of the river. At this and higher stages, the Willamette River between Harrisburg and Corvallis has historically been up to 3 miles wide.
- 32 - expect flooding of low spots of Hwy 99 south of Corvallis, the Corvallis-Albany Hwy, and Hwy 34 near Corvallis.
- 30 - expect extensive flooding of low-lying agricultural land east and south of Corvallis. Flooding of low areas of Hwy 34 and numerous roads in and near Corvallis begins.
Gauge Info
| Coordinates | 44.5664, -123.257 |
| RFC | NWRFC |
| State | OR |
| WFO | PQR |
| County | Benton |
| Data Provider(s) | |
| US Geological Survey | USGS--Water Resources of the United States |
| USGS | 14171600 |
Gauge Location
Recent Crests
| 1. | 32.84 ft | on 04-10-2019 |
| 2. | 27.37 ft | on 02-17-2014 |
| 3. | 28.90 ft | on 01-20-2012 |
| 4. | 25.20 ft | on 06-06-2010 |
| 5. | 30.65 ft | on 01-19-2006 |
Recent Crests
| 1. | 32.84 ft | on 04-10-2019 |
| 2. | 27.37 ft | on 02-17-2014 |
| 3. | 28.90 ft | on 01-20-2012 |
| 4. | 25.20 ft | on 06-06-2010 |
| 5. | 30.65 ft | on 01-19-2006 |
| 6. | 31.63 ft | on 01-01-1997 |
| 7. | 32.70 ft | on 11-21-1996 |
| 8. | 33.50 ft | on 02-09-1996 |
| 9. | 34.90 ft | on 12-07-1981 |
| 10. | 33.80 ft | on 12-04-1980 |
| 11. | 34.00 ft | on 01-17-1974 |
| 12. | 33.50 ft | on 03-03-1972 |
| 13. | 35.40 ft | on 01-18-1971 |
| 14. | 36.00 ft | on 12-24-1964 |
| 15. | 36.00 ft | on 12-23-1964 |
| 16. | 35.90 ft | on 02-11-1961 |
| 17. | 34.80 ft | on 12-23-1955 |
| 18. | 36.20 ft | on 01-19-1953 |
| 19. | 35.20 ft | on 10-30-1950 |
| 20. | 34.10 ft | on 12-13-1948 |
| 21. | 33.20 ft | on 02-23-1948 |
| 22. | 36.80 ft | on 01-08-1948 |
| 23. | 35.60 ft | on 12-15-1946 |
| 24. | 38.20 ft | on 12-29-1945 |
| 25. | 38.10 ft | on 01-02-1943 |
| 26. | 42.40 ft | on 12-01-1861 |
Historic Crests
| 1. | 42.40 ft | on 12-01-1861 |
| 2. | 38.20 ft | on 12-29-1945 |
| 3. | 38.10 ft | on 01-02-1943 |
| 4. | 36.80 ft | on 01-08-1948 |
| 5. | 36.20 ft | on 01-19-1953 |
Historic Crests
| 1. | 42.40 ft | on 12-01-1861 |
| 2. | 38.20 ft | on 12-29-1945 |
| 3. | 38.10 ft | on 01-02-1943 |
| 4. | 36.80 ft | on 01-08-1948 |
| 5. | 36.20 ft | on 01-19-1953 |
| 6. | 36.00 ft | on 12-24-1964 |
| 7. | 36.00 ft | on 12-23-1964 |
| 8. | 35.90 ft | on 02-11-1961 |
| 9. | 35.60 ft | on 12-15-1946 |
| 10. | 35.40 ft | on 01-18-1971 |
| 11. | 35.20 ft | on 10-30-1950 |
| 12. | 34.90 ft | on 12-07-1981 |
| 13. | 34.80 ft | on 12-23-1955 |
| 14. | 34.10 ft | on 12-13-1948 |
| 15. | 34.00 ft | on 01-17-1974 |
| 16. | 33.80 ft | on 12-04-1980 |
| 17. | 33.50 ft | on 03-03-1972 |
| 18. | 33.50 ft | on 02-09-1996 |
| 19. | 33.20 ft | on 02-23-1948 |
| 20. | 32.84 ft | on 04-10-2019 |
| 21. | 32.70 ft | on 11-21-1996 |
| 22. | 31.63 ft | on 01-01-1997 |
| 23. | 30.65 ft | on 01-19-2006 |
| 24. | 28.90 ft | on 01-20-2012 |
| 25. | 27.37 ft | on 02-17-2014 |
| 26. | 25.20 ft | on 06-06-2010 |
Vertical Datum Table
| type | NGVD29 |
|---|---|
| major Flooding | 216.00 ft |
| moderate Flooding | 213.00 ft |
| minor Flooding | 210.00 ft |
| action | 206.00 ft |
| Latest Value | 198.53 ft |
| Gauge Zero | 180.00 ft |
Unique Local Info
Datum was changed by 10 FEET in 2010. All related data (flood levels, impacts, historical crests) were updated to reflect datum change.
10-day Forecast/Trend, Northwest River Forecast Center
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