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This probabilistic forecast is issued by the Northwest River Forecast Center.
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About this graph
Forecasts for the Willamette River at Harrisburg are issued routinely year-round.
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Upstream Locations Upstream Gauge Downstream Gauge Downstream Gauge - at Corvallis
Zoom Level:15
Flood Categories (in feet)
Major Flood Stage: 17
Moderate Flood Stage: 0
Flood Stage: 14
Action Stage: 10.8
Low Stage (in feet): -9999

Historic Crests
(1) 23.00 ft on 12/04/1861
(2) 21.10 ft on 01/01/1943
(3) 19.69 ft on 12/29/1945
(4) 18.75 ft on 01/07/1948
(5) 18.40 ft on 12/31/1942
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(P): Preliminary values subject to further review.

Recent Crests
(1) 15.28 ft on 04/09/2019
(2) 13.76 ft on 12/18/2015
(3) 13.17 ft on 12/02/2012
(4) 13.81 ft on 01/25/2012
(5) 13.27 ft on 01/17/2011
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
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Gauge LocationGauge Map Marker
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
20 expect widespread and major flooding from north of Eugene to Harrisburg. Numerous small communites and developed areas historically flood near this level.
18 expect flooding of some homes and widespread lowland flooding. Highway 99E may be flooded and closed in numerous locations at this level.
17 major flood stage, Expect widespread flooding along the Willamette between Eugene and Albany, including several stretches of Hwy 99E in the vicinity of Harrisburg.
16 expect widespread low land flooding mainly west of the river. Portions of Highway 99E may be flooded. Historically, flooding near the Harrisburg Bridge has occurred at this and higher stages.
15 low parts of Highway 99E begin to flood. Expect widespread low land flooding along the Willamette River in the Harrisburg vicinity.
14 expect minor flooding along the Willamette River, mainly concentrated along the western banks.
12 sloughs in the Harrisburg vicinity begin to fill, and fields along west bank of the Willamette begin to flood.
(1) gage house
(2) Downstream view
(3) Upstream view

Other Real-time and/or Archive Data Sources:

Additional Information Collapse
10-day Forecast/Trend, Northwest River Forecast Center
Collaborative Agencies Collapse
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.
NWS Information
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Portland, OR 97230-1089
(503) 261-9246
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Page last modified: 2-Nov-2020 7:27 PM
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