National Weather Service Advanced Hydrologic Prediction Service

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This probabilistic forecast is issued by the Northwest River Forecast Center.

	Hydrograph			River at a Glance			Download			Probability Information Weekly Chance of Exceeding Levels Not Available Chance of Exceeding Levels During Entire Period Not Available Short-term Probabilistic Guidance (Experimental)

For official forecast click here

Experimental Short Range Forecast Uncertainty (AHPS) - External Links: Product Description Document | Customer Survey

About this graph

Forecasts for the Willamette River at Harrisburg are issued routinely year-round.

Return to Area Map

Upstream Gauge

Downstream Gauge

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
Show More Historic Crests

(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.

	Gauge Location	Disclaimer
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

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.
Photos (1) gage house (2) Downstream view (3) Upstream view

Other Real-time and/or Archive Data Sources:

U.S. Geological Survey (USGS) Data and Site Info for Harrisburg

Additional Information

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.

NWS Information

National Weather Service
Portland Weather Forecast Office
5241 NE 122nd Avenue
Portland, OR 97230-1089
(503) 261-9246
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Page last modified: 2-Nov-2020 7:27 PM

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