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Weather Forecast Office Portland, OR Northwest River Forecast Center
Special Weather Statement
View all valid statements/warnings
Hydrograph River at a Glance Download Weekly Chance of
Exceeding Levels		 Chance of Exceeding Levels
During Entire Period
Clackamas River near Oregon City Stage (ft)Flow (cfs)Observed: 24.74 ft at 11:15AM May 18, 2013Observed: 24.61 ft at 11:30AM May 18, 2013Observed: 24.73 ft at 12:00PM May 18, 2013Observed: 24.72 ft at 12:15PM May 18, 2013Observed: 24.71 ft at 12:30PM May 18, 2013Observed: 24.58 ft at 1:00PM May 18, 2013Observed: 24.77 ft at 1:15PM May 18, 2013Observed: 24.65 ft at 1:30PM May 18, 2013Observed: 24.74 ft at 2:00PM May 18, 2013Observed: 24.66 ft at 2:15PM May 18, 2013Observed: 24.74 ft at 2:30PM May 18, 2013Observed: 24.73 ft at 3:00PM May 18, 2013Observed: 24.74 ft at 3:15PM May 18, 2013Observed: 24.73 ft at 3:30PM May 18, 2013Observed: 24.71 ft at 4:00PM May 18, 2013Observed: 24.74 ft at 4:15PM May 18, 2013Observed: 24.74 ft at 4:30PM May 18, 2013Observed: 24.62 ft at 5:00PM May 18, 2013Observed: 24.65 ft at 5:15PM May 18, 2013Observed: 24.67 ft at 5:30PM May 18, 2013Observed: 24.72 ft at 6:00PM May 18, 2013Observed: 24.69 ft at 6:15PM May 18, 2013Observed: 24.73 ft at 6:30PM May 18, 2013Observed: 24.74 ft at 7:00PM May 18, 2013Observed: 24.66 ft at 7:15PM May 18, 2013Observed: 24.65 ft at 7:30PM May 18, 2013Observed: 24.66 ft at 8:00PM May 18, 2013Observed: 24.7 ft at 8:15PM May 18, 2013Observed: 24.67 ft at 8:30PM May 18, 2013Observed: 24.67 ft at 9:00PM May 18, 2013Observed: 24.74 ft at 9:15PM May 18, 2013Observed: 24.66 ft at 9:30PM May 18, 2013Observed: 24.73 ft at 10:00PM May 18, 2013Observed: 24.72 ft at 10:15PM May 18, 2013Observed: 24.77 ft at 10:30PM May 18, 2013Observed: 24.66 ft at 11:00PM May 18, 2013Observed: 24.57 ft at 11:15PM May 18, 2013Observed: 24.71 ft at 11:30PM May 18, 2013Observed: 24.65 ft at 12:00AM May 19, 2013Observed: 24.83 ft at 12:15AM May 19, 2013Observed: 24.82 ft at 12:30AM May 19, 2013Observed: 24.87 ft at 1:00AM May 19, 2013Observed: 24.77 ft at 1:15AM May 19, 2013Observed: 24.79 ft at 1:30AM May 19, 2013Observed: 24.79 ft at 2:00AM May 19, 2013Observed: 24.75 ft at 2:15AM May 19, 2013Observed: 24.81 ft at 2:30AM May 19, 2013Observed: 24.84 ft at 3:00AM May 19, 2013Observed: 24.83 ft at 3:15AM May 19, 2013Observed: 24.75 ft at 3:30AM May 19, 2013Observed: 24.76 ft at 4:00AM May 19, 2013Observed: 24.75 ft at 4:15AM May 19, 2013Observed: 24.78 ft at 4:30AM May 19, 2013Observed: 24.84 ft at 5:00AM May 19, 2013Observed: 24.87 ft at 5:15AM May 19, 2013Observed: 24.85 ft at 5:30AM May 19, 2013Observed: 24.81 ft at 6:00AM May 19, 2013Observed: 24.77 ft at 6:15AM May 19, 2013Observed: 24.82 ft at 6:30AM May 19, 2013Observed: 24.8 ft at 7:00AM May 19, 2013Observed: 24.91 ft at 7:15AM May 19, 2013Observed: 24.91 ft at 7:30AM May 19, 2013Observed: 24.88 ft at 8:00AM May 19, 2013Observed: 24.95 ft at 8:15AM May 19, 2013Observed: 24.97 ft at 8:30AM May 19, 2013Observed: 24.86 ft at 9:00AM May 19, 2013Observed: 24.96 ft at 9:15AM May 19, 2013Observed: 24.99 ft at 9:30AM May 19, 2013Observed: 24.96 ft at 10:00AM May 19, 2013Observed: 25.03 ft at 10:15AM May 19, 2013Observed: 24.87 ft at 10:30AM May 19, 2013Observed: 24.89 ft at 11:00AM May 19, 2013Observed: 24.98 ft at 11:15AM May 19, 2013Observed: 24.93 ft at 11:30AM May 19, 2013Observed: 24.98 ft at 12:00PM May 19, 2013Observed: 25.05 ft at 12:15PM May 19, 2013Observed: 25.15 ft at 12:30PM May 19, 2013Observed: 25.03 ft at 1:00PM May 19, 2013Observed: 25.17 ft at 1:15PM May 19, 2013Observed: 25.19 ft at 1:30PM May 19, 2013Observed: 25.12 ft at 2:00PM May 19, 2013Highest Observation: 25.25 ft at 2:15PM May 19, 2013Observed: 25.15 ft at 2:30PM May 19, 2013Observed: 25.23 ft at 3:00PM May 19, 2013Observed: 25.24 ft at 3:15PM May 19, 2013Observed: 25.19 ft at 3:30PM May 19, 2013Observed: 25.2 ft at 4:00PM May 19, 2013Observed: 25.14 ft at 4:15PM May 19, 2013Observed: 25.14 ft at 4:30PM May 19, 2013Observed: 25.11 ft at 5:00PM May 19, 2013Observed: 25.04 ft at 5:15PM May 19, 2013Observed: 25.1 ft at 5:30PM May 19, 2013Observed: 24.97 ft at 6:00PM May 19, 2013Observed: 25.11 ft at 6:15PM May 19, 2013Observed: 25.11 ft at 6:30PM May 19, 2013Observed: 25.08 ft at 7:00PM May 19, 2013Observed: 25.07 ft at 7:15PM May 19, 2013Observed: 25.01 ft at 7:30PM May 19, 2013Observed: 24.98 ft at 8:00PM May 19, 2013Observed: 25.02 ft at 8:15PM May 19, 2013Observed: 25.04 ft at 8:30PM May 19, 2013Observed: 25.02 ft at 9:00PM May 19, 2013Observed: 24.95 ft at 9:15PM May 19, 2013Observed: 24.96 ft at 9:30PM May 19, 2013Observed: 25.06 ft at 10:00PM May 19, 2013Observed: 24.92 ft at 10:15PM May 19, 2013Observed: 24.97 ft at 10:30PM May 19, 2013Observed: 24.84 ft at 11:00PM May 19, 2013Observed: 24.89 ft at 11:15PM May 19, 2013Observed: 24.84 ft at 11:30PM May 19, 2013Observed: 24.87 ft at 12:00AM May 20, 2013Observed: 24.91 ft at 12:15AM May 20, 2013Observed: 24.94 ft at 12:30AM May 20, 2013Observed: 24.99 ft at 1:00AM May 20, 2013Observed: 25 ft at 1:15AM May 20, 2013Observed: 24.95 ft at 1:30AM May 20, 2013Observed: 24.93 ft at 2:00AM May 20, 2013Observed: 24.9 ft at 2:15AM May 20, 2013Observed: 24.88 ft at 2:30AM May 20, 2013Observed: 24.87 ft at 3:00AM May 20, 2013Observed: 24.86 ft at 3:15AM May 20, 2013Observed: 24.85 ft at 3:30AM May 20, 2013Observed: 24.89 ft at 4:00AM May 20, 2013Observed: 24.81 ft at 4:15AM May 20, 2013Observed: 24.91 ft at 4:30AM May 20, 2013Observed: 24.84 ft at 5:00AM May 20, 2013Observed: 24.95 ft at 5:15AM May 20, 2013Observed: 24.86 ft at 5:30AM May 20, 2013Observed: 24.86 ft at 6:00AM May 20, 2013Observed: 24.79 ft at 6:15AM May 20, 2013Observed: 24.78 ft at 6:30AM May 20, 2013Observed: 24.82 ft at 7:00AM May 20, 2013Observed: 24.82 ft at 7:15AM May 20, 2013Observed: 24.7 ft at 7:30AM May 20, 2013Observed: 24.79 ft at 8:00AM May 20, 2013Observed: 24.66 ft at 8:15AM May 20, 2013Observed: 24.8 ft at 8:30AM May 20, 2013Observed: 24.76 ft at 9:00AM May 20, 2013Observed: 24.71 ft at 9:15AM May 20, 2013Observed: 24.68 ft at 9:30AM May 20, 2013Observed: 24.79 ft at 10:00AM May 20, 2013Observed: 24.77 ft at 10:15AM May 20, 2013Observed: 24.8 ft at 10:30AM May 20, 2013Observed: 24.76 ft at 11:00AM May 20, 2013Observed: 24.76 ft at 11:15AM May 20, 2013Observed: 24.72 ft at 11:30AM May 20, 2013Observed: 24.66 ft at 12:00PM May 20, 2013Observed: 24.74 ft at 12:15PM May 20, 2013Observed: 24.77 ft at 12:30PM May 20, 2013Observed: 24.75 ft at 1:00PM May 20, 2013Observed: 24.76 ft at 1:15PM May 20, 2013Observed: 24.71 ft at 1:30PM May 20, 2013Observed: 24.77 ft at 2:00PM May 20, 2013Observed: 24.64 ft at 2:15PM May 20, 2013Observed: 24.66 ft at 2:30PM May 20, 2013Observed: 24.66 ft at 3:00PM May 20, 2013Observed: 24.77 ft at 3:15PM May 20, 2013Observed: 24.66 ft at 3:30PM May 20, 2013Observed: 24.73 ft at 4:00PM May 20, 2013Observed: 24.76 ft at 4:15PM May 20, 2013Observed: 24.71 ft at 4:30PM May 20, 2013Observed: 24.77 ft at 5:00PM May 20, 2013Observed: 24.75 ft at 5:15PM May 20, 2013Observed: 24.66 ft at 5:30PM May 20, 2013Observed: 24.78 ft at 6:00PM May 20, 2013Observed: 24.76 ft at 6:15PM May 20, 2013Observed: 24.81 ft at 6:30PM May 20, 2013Observed: 24.72 ft at 7:00PM May 20, 2013Observed: 24.66 ft at 7:15PM May 20, 2013Observed: 24.68 ft at 7:30PM May 20, 2013Observed: 24.63 ft at 8:00PM May 20, 2013Observed: 24.65 ft at 8:15PM May 20, 2013Observed: 24.63 ft at 8:30PM May 20, 2013Observed: 24.73 ft at 9:00PM May 20, 2013Observed: 24.61 ft at 9:15PM May 20, 2013Observed: 24.64 ft at 9:30PM May 20, 2013Observed: 24.74 ft at 10:00PM May 20, 2013Observed: 24.71 ft at 10:15PM May 20, 2013Observed: 24.72 ft at 10:30PM May 20, 2013Observed: 24.7 ft at 11:00PM May 20, 2013Observed: 24.69 ft at 11:15PM May 20, 2013Observed: 24.64 ft at 11:30PM May 20, 2013Observed: 24.67 ft at 12:00AM May 21, 2013Observed: 24.68 ft at 12:15AM May 21, 2013Observed: 24.65 ft at 12:30AM May 21, 2013Observed: 24.66 ft at 1:00AM May 21, 2013Observed: 24.67 ft at 1:15AM May 21, 2013Observed: 24.68 ft at 1:30AM May 21, 2013Observed: 24.69 ft at 2:00AM May 21, 2013Observed: 24.65 ft at 2:15AM May 21, 2013Observed: 24.61 ft at 2:30AM May 21, 2013Observed: 24.62 ft at 3:00AM May 21, 2013Observed: 24.68 ft at 3:15AM May 21, 2013Observed: 24.64 ft at 3:30AM May 21, 2013Observed: 24.54 ft at 4:00AM May 21, 2013Observed: 24.65 ft at 4:15AM May 21, 2013Observed: 24.61 ft at 4:30AM May 21, 2013Observed: 24.63 ft at 5:00AM May 21, 2013Observed: 24.68 ft at 5:15AM May 21, 2013Observed: 24.6 ft at 5:30AM May 21, 2013Observed: 24.72 ft at 6:00AM May 21, 2013Observed: 24.67 ft at 6:15AM May 21, 2013Observed: 24.71 ft at 6:30AM May 21, 2013Observed: 24.52 ft at 7:00AM May 21, 2013Observed: 24.65 ft at 7:15AM May 21, 2013Observed: 24.59 ft at 7:30AM May 21, 2013Observed: 24.64 ft at 8:00AM May 21, 2013Observed: 24.67 ft at 8:15AM May 21, 2013Observed: 24.71 ft at 8:30AM May 21, 2013Observed: 24.69 ft at 9:00AM May 21, 2013Observed: 24.72 ft at 9:15AM May 21, 2013Observed: 24.67 ft at 9:30AM May 21, 2013Observed: 24.7 ft at 10:00AM May 21, 2013Observed: 24.67 ft at 10:15AM May 21, 2013Observed: 24.59 ft at 10:30AM May 21, 2013Forecast: 24.75 ft 5:00PM May 21, 2013Forecast: 24.95 ft 11:00PM May 21, 2013Forecast: 25.19 ft 5:00AM May 22, 2013Forecast: 25.26 ft 11:00AM May 22, 2013Forecast: 25.27 ft 5:00PM May 22, 2013Highest Forecast: 25.3 ft 11:00PM May 22, 2013Forecast: 25.28 ft 5:00AM May 23, 2013Forecast: 25.24 ft 11:00AM May 23, 2013Forecast: 25.21 ft 5:00PM May 23, 2013Forecast: 25.15 ft 11:00PM May 23, 2013Forecast: 25.13 ft 5:00AM May 24, 2013Forecast: 25.14 ft 11:00AM May 24, 2013Forecast: 25.15 ft 5:00PM May 24, 2013Forecast: 25.16 ft 11:00PM May 24, 2013Forecast: 25.17 ft 5:00AM May 25, 2013Forecast: 25.15 ft 11:00AM May 25, 2013Forecast: 25.12 ft 5:00PM May 25, 2013Forecast: 25.08 ft 11:00PM May 25, 2013Forecast: 25.04 ft 5:00AM May 26, 2013Forecast: 24.99 ft 11:00AM May 26, 2013USGS--Water Resources of the United StatesCOCO3(plotting HGIRP) Graph Created (11:12AM May 21, 2013)ObservedForecast (issued 8:21AM May 20)Latest observed value: 24.59 ft at 10:30 AM PDT 21-May-2013. Flood Stage is 39 ft
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Tabular Data
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Datum: Not Available
Metadata
NOTE: Forecasts for the Clackamas River near Oregon City are issued routinely year-round.
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Upstream Gauge - near Estacada Upstream Gauge Downstream Gauge Downstream Gauge - at Portland
Flood Categories (in feet)
Major Flood Stage:46
Moderate Flood Stage:0
Flood Stage:39
Action Stage:38

Historical 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 Historical Crests

Low Water Records
Legend
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 Collapse
46 ABOVE 46 FEET...EXPECT MAJOR FLOODING OF SOME RESIDENCES AND BUILDINGS ALONG THE LOWER CLACKAMAS RIVER...INCLUDING THE MOBILE HOME PARK JUST DOWNSTREAM OF CARVER BRIDGE.
42 ABOVE 42.0 FT...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 ABOVE 39.0 FT...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.
About This Location Collapse

Latitude: 45.379722° N, Longitude: 122.578056° 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 Not Available 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 0 ft 39 ft  

Other Data Sources:
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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 Weather Forecast Office
5241 NE 122nd Avenue
Portland, OR 97230-1089
(503) 261-9246
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Page last modified: 13-Mar-2013 6:31 PM 		Disclaimer
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