National Weather Service Advanced Hydrologic Prediction Service

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Visit https://www.weather.gov/owp/operations for access to new EXPERIMENTAL products and services from the National Water Center: National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook and the National Water Center Visualization Services, a suite of geospatial services depicting River Forecast Center and National Water Model information.

View the Enhanced Operating Capability Products and Services StoryMap here

Weather Forecast Office Portland, OR

Northwest River Forecast Center

Special Weather Statement

Hydrograph

River at a Glance

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About this graph

Tabular Data (UTC)

Tabular Data (PDT)

Datum: NAVD88

Metadata

NOTE: Forecasts for the Clackamas River near Oregon City are issued routinely year-round.

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Upstream Gauge

Flood Categories (in feet)

Major Flood Stage:	46
Moderate Flood Stage:	0
Flood Stage:	39
Action Stage:	38
Low Stage (in feet):	-9999

Historic Crests
(1) 45.41 ft on 01/02/2009
(2) 42.52 ft on 01/17/2011
(3) 40.64 ft on 01/11/2006
(4) 40.61 ft on 12/31/2005
(5) 39.53 ft on 01/20/2012
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 39.53 ft on 01/20/2012
(2) 42.52 ft on 01/17/2011
(3) 45.41 ft on 01/02/2009
(4) 39.35 ft on 11/07/2006
(5) 40.64 ft on 01/11/2006
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to www.floodsmart.gov.

Show FEMA's National Flood Hazard Layers

Zoom Level:16

	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
46	expect major flooding of some residences and buildings along the lower Clackamas River, including the mobile home park just downstream of Carver Bridge.
42	expect flooding of parks, agricultural land, and low-lying areas along the lower Clackamas River from the Carver Bridge down to the confluence with the Willamette.
39	expect minor flooding of low areas along the lower Clackamas River, including Clackamette Park, the Oregon City shopping center, and some agricultural land downstream of Carver Bridge.
Photos (1) Upstream view (2) Downstream view

About This Location

Latitude: 45.379287° N, Longitude: 122.577313° W, Horizontal Datum: NAD83/WGS84

River Stage Reference Frame	Gauge Height	Flood Stage	Uses
NWS stage	0 ft	39 ft	Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum	Elevation (gauge height = 0)	Elevation (gauge height = flood stage)	Elevation information source
NAVD88	Not Available	39	Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29	Not Available	Not Available	Older USGS topographic maps, NGVD29 benchmarks
MSL	Not Available	Not Available	Older USGS topographic maps, MSL benchmarks
Other	Not Available	Not Available

Current/Historical Observations:

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

Additional Information

10-day Forecast/Trend, Northwest River Forecast Center

Resources

Hydrologic Resources

Additional Resources

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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