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Over 200 USGS real-time streamgages used to support NWS river forecasts and warnings are at risk of being discontinued. Click here for more information from the USGS...
Weather Forecast Office Portland, OR Northwest River Forecast Center
Hydrograph River at a Glance Download Weekly Chance of
Exceeding Levels		 Chance of Exceeding Levels
During Entire Period
Molalla River near Canby Stage (ft)Flow (cfs)Observed: 11 ft at 11:30AM Jun 16, 2013Observed: 11 ft at 12:00PM Jun 16, 2013Observed: 11 ft at 12:30PM Jun 16, 2013Observed: 11 ft at 1:00PM Jun 16, 2013Observed: 11 ft at 1:30PM Jun 16, 2013Observed: 11 ft at 2:00PM Jun 16, 2013Observed: 11 ft at 2:30PM Jun 16, 2013Observed: 11 ft at 3:00PM Jun 16, 2013Observed: 11 ft at 3:30PM Jun 16, 2013Observed: 11 ft at 4:00PM Jun 16, 2013Observed: 11 ft at 4:30PM Jun 16, 2013Observed: 11 ft at 5:00PM Jun 16, 2013Observed: 11 ft at 5:30PM Jun 16, 2013Observed: 11 ft at 6:00PM Jun 16, 2013Observed: 11 ft at 6:30PM Jun 16, 2013Observed: 11 ft at 7:00PM Jun 16, 2013Observed: 11 ft at 7:30PM Jun 16, 2013Observed: 11 ft at 8:00PM Jun 16, 2013Observed: 11 ft at 8:30PM Jun 16, 2013Observed: 11 ft at 9:00PM Jun 16, 2013Observed: 11.01 ft at 9:30PM Jun 16, 2013Observed: 11 ft at 10:00PM Jun 16, 2013Observed: 11 ft at 10:30PM Jun 16, 2013Observed: 11 ft at 11:00PM Jun 16, 2013Observed: 11 ft at 11:30PM Jun 16, 2013Observed: 11 ft at 12:00AM Jun 17, 2013Observed: 11 ft at 12:30AM Jun 17, 2013Observed: 11 ft at 1:00AM Jun 17, 2013Observed: 11 ft at 1:30AM Jun 17, 2013Observed: 11 ft at 2:00AM Jun 17, 2013Observed: 10.99 ft at 2:30AM Jun 17, 2013Observed: 10.99 ft at 3:00AM Jun 17, 2013Observed: 10.99 ft at 3:30AM Jun 17, 2013Observed: 10.98 ft at 4:00AM Jun 17, 2013Observed: 10.98 ft at 4:30AM Jun 17, 2013Observed: 10.98 ft at 5:00AM Jun 17, 2013Observed: 10.98 ft at 5:30AM Jun 17, 2013Observed: 10.98 ft at 6:00AM Jun 17, 2013Observed: 10.97 ft at 6:30AM Jun 17, 2013Observed: 10.97 ft at 7:00AM Jun 17, 2013Observed: 10.96 ft at 7:30AM Jun 17, 2013Observed: 10.96 ft at 8:00AM Jun 17, 2013Observed: 10.96 ft at 8:30AM Jun 17, 2013Observed: 10.96 ft at 9:00AM Jun 17, 2013Observed: 10.96 ft at 9:30AM Jun 17, 2013Observed: 10.95 ft at 10:00AM Jun 17, 2013Observed: 10.95 ft at 10:30AM Jun 17, 2013Observed: 10.95 ft at 11:00AM Jun 17, 2013Observed: 10.95 ft at 11:30AM Jun 17, 2013Observed: 10.95 ft at 12:00PM Jun 17, 2013Observed: 10.95 ft at 12:30PM Jun 17, 2013Observed: 10.95 ft at 1:00PM Jun 17, 2013Observed: 10.95 ft at 1:30PM Jun 17, 2013Observed: 10.95 ft at 2:00PM Jun 17, 2013Observed: 10.94 ft at 2:30PM Jun 17, 2013Observed: 10.94 ft at 3:00PM Jun 17, 2013Observed: 10.94 ft at 3:30PM Jun 17, 2013Observed: 10.94 ft at 4:00PM Jun 17, 2013Observed: 10.94 ft at 4:30PM Jun 17, 2013Observed: 10.94 ft at 5:00PM Jun 17, 2013Observed: 10.94 ft at 5:30PM Jun 17, 2013Observed: 10.94 ft at 6:00PM Jun 17, 2013Observed: 10.94 ft at 6:30PM Jun 17, 2013Observed: 10.94 ft at 7:00PM Jun 17, 2013Observed: 10.94 ft at 7:30PM Jun 17, 2013Observed: 10.94 ft at 8:00PM Jun 17, 2013Observed: 10.95 ft at 8:30PM Jun 17, 2013Observed: 10.95 ft at 9:00PM Jun 17, 2013Observed: 10.95 ft at 9:30PM Jun 17, 2013Observed: 10.95 ft at 10:00PM Jun 17, 2013Observed: 10.95 ft at 10:30PM Jun 17, 2013Observed: 10.95 ft at 11:00PM Jun 17, 2013Observed: 10.95 ft at 11:30PM Jun 17, 2013Observed: 10.95 ft at 12:00AM Jun 18, 2013Observed: 10.94 ft at 12:30AM Jun 18, 2013Observed: 10.94 ft at 1:00AM Jun 18, 2013Observed: 10.94 ft at 1:30AM Jun 18, 2013Observed: 10.94 ft at 2:00AM Jun 18, 2013Observed: 10.94 ft at 2:30AM Jun 18, 2013Observed: 10.94 ft at 3:00AM Jun 18, 2013Observed: 10.93 ft at 3:30AM Jun 18, 2013Observed: 10.93 ft at 4:00AM Jun 18, 2013Observed: 10.93 ft at 4:30AM Jun 18, 2013Observed: 10.93 ft at 5:00AM Jun 18, 2013Observed: 10.93 ft at 5:30AM Jun 18, 2013Observed: 10.93 ft at 6:00AM Jun 18, 2013Observed: 10.92 ft at 6:30AM Jun 18, 2013Observed: 10.92 ft at 7:00AM Jun 18, 2013Observed: 10.92 ft at 7:30AM Jun 18, 2013Observed: 10.92 ft at 8:00AM Jun 18, 2013Observed: 10.91 ft at 8:30AM Jun 18, 2013Observed: 10.91 ft at 9:00AM Jun 18, 2013Observed: 10.91 ft at 9:30AM Jun 18, 2013Observed: 10.91 ft at 10:00AM Jun 18, 2013Observed: 10.91 ft at 10:30AM Jun 18, 2013Observed: 10.91 ft at 11:00AM Jun 18, 2013Observed: 10.92 ft at 11:30AM Jun 18, 2013Observed: 10.91 ft at 12:00PM Jun 18, 2013Observed: 10.92 ft at 12:30PM Jun 18, 2013Observed: 10.92 ft at 1:00PM Jun 18, 2013Observed: 10.93 ft at 1:30PM Jun 18, 2013Observed: 10.93 ft at 2:00PM Jun 18, 2013Observed: 10.93 ft at 2:30PM Jun 18, 2013Observed: 10.93 ft at 3:00PM Jun 18, 2013Observed: 10.94 ft at 3:30PM Jun 18, 2013Observed: 10.94 ft at 4:00PM Jun 18, 2013Observed: 10.94 ft at 4:30PM Jun 18, 2013Observed: 10.93 ft at 5:00PM Jun 18, 2013Observed: 10.93 ft at 5:30PM Jun 18, 2013Observed: 10.93 ft at 6:00PM Jun 18, 2013Observed: 10.93 ft at 6:30PM Jun 18, 2013Observed: 10.93 ft at 7:00PM Jun 18, 2013Observed: 10.93 ft at 7:30PM Jun 18, 2013Observed: 10.93 ft at 8:00PM Jun 18, 2013Observed: 10.93 ft at 8:30PM Jun 18, 2013Observed: 10.93 ft at 9:00PM Jun 18, 2013Observed: 10.93 ft at 9:30PM Jun 18, 2013Observed: 10.93 ft at 10:00PM Jun 18, 2013Observed: 10.93 ft at 10:30PM Jun 18, 2013Observed: 10.93 ft at 11:00PM Jun 18, 2013Observed: 10.93 ft at 11:30PM Jun 18, 2013Observed: 10.94 ft at 12:00AM Jun 19, 2013Observed: 10.93 ft at 12:30AM Jun 19, 2013Observed: 10.94 ft at 1:00AM Jun 19, 2013Observed: 10.94 ft at 1:30AM Jun 19, 2013Observed: 10.94 ft at 2:00AM Jun 19, 2013Observed: 10.94 ft at 2:30AM Jun 19, 2013Observed: 10.94 ft at 3:00AM Jun 19, 2013Observed: 10.94 ft at 3:30AM Jun 19, 2013Observed: 10.94 ft at 4:00AM Jun 19, 2013Observed: 10.94 ft at 4:30AM Jun 19, 2013Observed: 10.94 ft at 5:00AM Jun 19, 2013Observed: 10.94 ft at 5:30AM Jun 19, 2013Observed: 10.95 ft at 6:00AM Jun 19, 2013Observed: 10.95 ft at 6:30AM Jun 19, 2013Observed: 10.95 ft at 7:00AM Jun 19, 2013Observed: 10.96 ft at 7:30AM Jun 19, 2013Observed: 10.96 ft at 8:00AM Jun 19, 2013Observed: 10.98 ft at 8:30AM Jun 19, 2013Observed: 10.99 ft at 9:00AM Jun 19, 2013Highest Observation: 11.02 ft at 9:30AM Jun 19, 2013Highest Observation: 11.02 ft at 10:00AM Jun 19, 2013Forecast: 10.99 ft 5:00PM Jun 19, 2013Highest Forecast: 11 ft 11:00PM Jun 19, 2013Forecast: 10.98 ft 5:00AM Jun 20, 2013Forecast: 10.95 ft 11:00AM Jun 20, 2013Forecast: 10.94 ft 5:00PM Jun 20, 2013Forecast: 10.93 ft 11:00PM Jun 20, 2013Forecast: 10.92 ft 5:00AM Jun 21, 2013Forecast: 10.9 ft 11:00AM Jun 21, 2013Forecast: 10.9 ft 5:00PM Jun 21, 2013Forecast: 10.89 ft 11:00PM Jun 21, 2013Forecast: 10.88 ft 5:00AM Jun 22, 2013Forecast: 10.87 ft 11:00AM Jun 22, 2013Forecast: 10.87 ft 5:00PM Jun 22, 2013Forecast: 10.86 ft 11:00PM Jun 22, 2013Forecast: 10.85 ft 5:00AM Jun 23, 2013Forecast: 10.87 ft 11:00AM Jun 23, 2013Forecast: 10.9 ft 5:00PM Jun 23, 2013Forecast: 10.91 ft 11:00PM Jun 23, 2013Forecast: 10.92 ft 5:00AM Jun 24, 2013Forecast: 10.89 ft 11:00AM Jun 24, 2013USGS--Water Resources of the United StatesCANO3(plotting HGIRG) Graph Created (11:02AM Jun 19, 2013)ObservedForecast (issued 8:36AM Jun 19)Latest observed value: 11.02 ft at 10:00 AM PDT 19-Jun-2013. Flood Stage is 23 ft
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About this graph
Tabular Data
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts for the Molalla River near Canby are issued routinely year-round.
Return to Area Map
Upstream Gauge - at Shady Dell near Molalla 2ESE Upstream Gauge Downstream Gauge Downstream Gauge - above Falls at Oregon City
Flood Categories (in feet)
Major Flood Stage:25
Moderate Flood Stage:0
Flood Stage:23
Action Stage:20

Historical Crests
(1) 26.76 ft on 12/22/1964
(2) 25.45 ft on 01/21/1972
(3) 25.00 ft on 11/24/1960
(4) 24.90 ft on 01/07/1948
(5) 24.60 ft on 02/07/1996
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
25 ABOVE 25 FT...EXPECT MAJOR FLOODING FROM CANBY TO THE WILLAMETTE RIVER. HISTORICALLY...BUSINESSES ALONG HIGHWAY 99E IN WEST CANBY HAVE BEEN THREATENED BY HIGH WATER AT THIS POINT. FLOODING IN THE COMMUNITY OF BARLOW CAN BE EXPECTED AT THIS AND HIGHER STAGES...ALONG WITH FLOODING OF NUMEROUS HOMES AND AGRICULTURAL LAND.
24 ABOVE 24 FT...EXPECT WIDESPREAD FLOODING OF AGRICULTURAL LAND AND SECONDARY ROADS. HISTORICALLY...BUILDINGS AND OTHER STRUCTURES IN THE LOWER SECTIONS OF THE RIVER FROM CANBY DOWNSTREAM TO THE CONFLUENCE WITH THE PUDDING RIVER BEGIN TO FLOOD AT THIS POINT.
23 ABOVE 23 FT...EXPECT FLOODING OF LOW-LYING AGRICULTURAL LAND FROM CANBY DOWNSTREAM TO THE CONFLUENCE WITH THE PUDDING RIVER. SOME SECONDARY ROADS AND A FEW STRUCTURES MAY BEGIN TO FLOOD.
About This Location Collapse

Latitude: 45.244167° N, Longitude: 122.687500° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 23 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 94 ft 117 ft  

Other Data Sources:
Additional Information Collapse
Archived/Historical Data at USACE DataQuery
10-day Forecast/Trend, Northwest River Forecast Center
Resources Collapse
Hydrologic Resources Additional Resources
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
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: 13-Mar-2013 6:31 PM 		Disclaimer
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