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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
Marys River near Philomath Stage (ft)Flow (cfs)Observed: 3.48 ft at 12:30AM May 14, 2013Observed: 3.48 ft at 1:00AM May 14, 2013Observed: 3.48 ft at 1:30AM May 14, 2013Observed: 3.48 ft at 2:00AM May 14, 2013Observed: 3.48 ft at 2:30AM May 14, 2013Observed: 3.48 ft at 3:00AM May 14, 2013Observed: 3.47 ft at 3:30AM May 14, 2013Observed: 3.48 ft at 4:00AM May 14, 2013Observed: 3.48 ft at 4:30AM May 14, 2013Observed: 3.48 ft at 5:00AM May 14, 2013Observed: 3.49 ft at 5:30AM May 14, 2013Observed: 3.5 ft at 6:00AM May 14, 2013Observed: 3.5 ft at 6:30AM May 14, 2013Observed: 3.51 ft at 7:00AM May 14, 2013Observed: 3.5 ft at 7:30AM May 14, 2013Observed: 3.51 ft at 8:00AM May 14, 2013Observed: 3.51 ft at 8:30AM May 14, 2013Observed: 3.5 ft at 9:00AM May 14, 2013Observed: 3.5 ft at 9:30AM May 14, 2013Observed: 3.49 ft at 10:00AM May 14, 2013Observed: 3.49 ft at 10:30AM May 14, 2013Observed: 3.5 ft at 11:00AM May 14, 2013Observed: 3.5 ft at 11:30AM May 14, 2013Observed: 3.5 ft at 12:00PM May 14, 2013Observed: 3.5 ft at 12:30PM May 14, 2013Observed: 3.49 ft at 1:00PM May 14, 2013Observed: 3.49 ft at 1:30PM May 14, 2013Observed: 3.49 ft at 2:00PM May 14, 2013Observed: 3.5 ft at 2:30PM May 14, 2013Observed: 3.5 ft at 3:00PM May 14, 2013Observed: 3.51 ft at 3:30PM May 14, 2013Observed: 3.51 ft at 4:00PM May 14, 2013Observed: 3.5 ft at 4:30PM May 14, 2013Observed: 3.49 ft at 5:00PM May 14, 2013Observed: 3.48 ft at 5:30PM May 14, 2013Observed: 3.49 ft at 6:00PM May 14, 2013Observed: 3.48 ft at 6:30PM May 14, 2013Observed: 3.48 ft at 7:00PM May 14, 2013Observed: 3.49 ft at 7:30PM May 14, 2013Observed: 3.49 ft at 8:00PM May 14, 2013Observed: 3.49 ft at 8:30PM May 14, 2013Observed: 3.49 ft at 9:00PM May 14, 2013Observed: 3.48 ft at 9:30PM May 14, 2013Observed: 3.48 ft at 10:00PM May 14, 2013Observed: 3.48 ft at 10:30PM May 14, 2013Observed: 3.47 ft at 11:00PM May 14, 2013Observed: 3.46 ft at 11:30PM May 14, 2013Observed: 3.45 ft at 12:00AM May 15, 2013Observed: 3.45 ft at 12:30AM May 15, 2013Observed: 3.45 ft at 1:00AM May 15, 2013Observed: 3.45 ft at 1:30AM May 15, 2013Observed: 3.45 ft at 2:00AM May 15, 2013Observed: 3.45 ft at 2:30AM May 15, 2013Observed: 3.45 ft at 3:00AM May 15, 2013Observed: 3.45 ft at 3:30AM May 15, 2013Observed: 3.44 ft at 4:00AM May 15, 2013Observed: 3.45 ft at 4:30AM May 15, 2013Observed: 3.45 ft at 5:00AM May 15, 2013Observed: 3.45 ft at 5:30AM May 15, 2013Observed: 3.46 ft at 6:00AM May 15, 2013Observed: 3.46 ft at 6:30AM May 15, 2013Observed: 3.47 ft at 7:00AM May 15, 2013Observed: 3.46 ft at 7:30AM May 15, 2013Observed: 3.46 ft at 8:00AM May 15, 2013Observed: 3.46 ft at 8:30AM May 15, 2013Observed: 3.46 ft at 9:00AM May 15, 2013Observed: 3.46 ft at 9:30AM May 15, 2013Observed: 3.45 ft at 10:00AM May 15, 2013Observed: 3.45 ft at 10:30AM May 15, 2013Observed: 3.45 ft at 11:00AM May 15, 2013Observed: 3.45 ft at 11:30AM May 15, 2013Observed: 3.45 ft at 12:00PM May 15, 2013Observed: 3.45 ft at 12:30PM May 15, 2013Observed: 3.46 ft at 1:00PM May 15, 2013Observed: 3.46 ft at 1:30PM May 15, 2013Observed: 3.47 ft at 2:00PM May 15, 2013Observed: 3.48 ft at 2:30PM May 15, 2013Observed: 3.49 ft at 3:00PM May 15, 2013Observed: 3.49 ft at 3:30PM May 15, 2013Observed: 3.48 ft at 4:00PM May 15, 2013Observed: 3.48 ft at 4:30PM May 15, 2013Observed: 3.47 ft at 5:00PM May 15, 2013Observed: 3.48 ft at 5:30PM May 15, 2013Observed: 3.48 ft at 6:00PM May 15, 2013Observed: 3.48 ft at 6:30PM May 15, 2013Observed: 3.48 ft at 7:00PM May 15, 2013Observed: 3.49 ft at 7:30PM May 15, 2013Observed: 3.49 ft at 8:00PM May 15, 2013Observed: 3.49 ft at 8:30PM May 15, 2013Observed: 3.49 ft at 9:00PM May 15, 2013Observed: 3.49 ft at 9:30PM May 15, 2013Observed: 3.48 ft at 10:00PM May 15, 2013Observed: 3.48 ft at 10:30PM May 15, 2013Observed: 3.48 ft at 11:00PM May 15, 2013Observed: 3.47 ft at 11:30PM May 15, 2013Observed: 3.47 ft at 12:00AM May 16, 2013Observed: 3.47 ft at 12:30AM May 16, 2013Observed: 3.46 ft at 1:00AM May 16, 2013Observed: 3.47 ft at 1:30AM May 16, 2013Observed: 3.46 ft at 2:00AM May 16, 2013Observed: 3.46 ft at 2:30AM May 16, 2013Observed: 3.46 ft at 3:00AM May 16, 2013Observed: 3.46 ft at 3:30AM May 16, 2013Observed: 3.46 ft at 4:00AM May 16, 2013Observed: 3.47 ft at 4:30AM May 16, 2013Observed: 3.47 ft at 5:00AM May 16, 2013Observed: 3.47 ft at 5:30AM May 16, 2013Observed: 3.48 ft at 6:00AM May 16, 2013Observed: 3.48 ft at 6:30AM May 16, 2013Observed: 3.49 ft at 7:00AM May 16, 2013Observed: 3.49 ft at 7:30AM May 16, 2013Observed: 3.49 ft at 8:00AM May 16, 2013Observed: 3.49 ft at 8:30AM May 16, 2013Observed: 3.49 ft at 9:00AM May 16, 2013Observed: 3.49 ft at 9:30AM May 16, 2013Observed: 3.49 ft at 10:00AM May 16, 2013Observed: 3.48 ft at 10:30AM May 16, 2013Observed: 3.49 ft at 11:00AM May 16, 2013Observed: 3.48 ft at 11:30AM May 16, 2013Observed: 3.49 ft at 12:00PM May 16, 2013Observed: 3.49 ft at 12:30PM May 16, 2013Observed: 3.49 ft at 1:00PM May 16, 2013Observed: 3.49 ft at 1:30PM May 16, 2013Observed: 3.49 ft at 2:00PM May 16, 2013Observed: 3.49 ft at 2:30PM May 16, 2013Observed: 3.49 ft at 3:00PM May 16, 2013Observed: 3.5 ft at 3:30PM May 16, 2013Observed: 3.51 ft at 4:00PM May 16, 2013Observed: 3.51 ft at 4:30PM May 16, 2013Observed: 3.52 ft at 5:00PM May 16, 2013Observed: 3.52 ft at 5:30PM May 16, 2013Observed: 3.53 ft at 6:00PM May 16, 2013Observed: 3.53 ft at 6:30PM May 16, 2013Observed: 3.53 ft at 7:00PM May 16, 2013Observed: 3.53 ft at 7:30PM May 16, 2013Highest Observation: 3.54 ft at 8:00PM May 16, 2013Highest Observation: 3.54 ft at 8:30PM May 16, 2013Highest Observation: 3.54 ft at 9:00PM May 16, 2013Observed: 3.53 ft at 9:30PM May 16, 2013Observed: 3.53 ft at 10:00PM May 16, 2013Observed: 3.53 ft at 10:30PM May 16, 2013Observed: 3.53 ft at 11:00PM May 16, 2013Observed: 3.52 ft at 11:30PM May 16, 2013Observed: 3.52 ft at 12:00AM May 17, 2013Observed: 3.52 ft at 12:30AM May 17, 2013Observed: 3.51 ft at 1:00AM May 17, 2013Observed: 3.51 ft at 1:30AM May 17, 2013Observed: 3.51 ft at 2:00AM May 17, 2013Observed: 3.51 ft at 2:30AM May 17, 2013Observed: 3.49 ft at 3:00AM May 17, 2013Observed: 3.49 ft at 3:30AM May 17, 2013Observed: 3.49 ft at 4:00AM May 17, 2013Observed: 3.49 ft at 4:30AM May 17, 2013Observed: 3.49 ft at 5:00AM May 17, 2013Observed: 3.49 ft at 5:30AM May 17, 2013Observed: 3.49 ft at 6:00AM May 17, 2013Observed: 3.49 ft at 6:30AM May 17, 2013Observed: 3.49 ft at 7:00AM May 17, 2013Observed: 3.49 ft at 7:30AM May 17, 2013Observed: 3.49 ft at 8:00AM May 17, 2013Observed: 3.49 ft at 8:30AM May 17, 2013Observed: 3.49 ft at 9:00AM May 17, 2013Observed: 3.48 ft at 9:30AM May 17, 2013Observed: 3.48 ft at 10:00AM May 17, 2013Observed: 3.48 ft at 10:30AM May 17, 2013Observed: 3.48 ft at 11:00AM May 17, 2013Observed: 3.48 ft at 11:30AM May 17, 2013Observed: 3.48 ft at 12:00PM May 17, 2013Observed: 3.48 ft at 12:30PM May 17, 2013Observed: 3.49 ft at 1:00PM May 17, 2013Observed: 3.5 ft at 1:30PM May 17, 2013Observed: 3.51 ft at 2:00PM May 17, 2013Observed: 3.52 ft at 2:30PM May 17, 2013Observed: 3.52 ft at 3:00PM May 17, 2013Observed: 3.52 ft at 3:30PM May 17, 2013Observed: 3.51 ft at 4:00PM May 17, 2013Observed: 3.5 ft at 4:30PM May 17, 2013Observed: 3.49 ft at 5:00PM May 17, 2013Observed: 3.49 ft at 5:30PM May 17, 2013Observed: 3.49 ft at 6:00PM May 17, 2013Observed: 3.48 ft at 6:30PM May 17, 2013Observed: 3.48 ft at 7:00PM May 17, 2013Observed: 3.48 ft at 7:30PM May 17, 2013Observed: 3.46 ft at 8:00PM May 17, 2013Observed: 3.46 ft at 8:30PM May 17, 2013Observed: 3.45 ft at 9:00PM May 17, 2013Observed: 3.45 ft at 9:30PM May 17, 2013Observed: 3.45 ft at 10:00PM May 17, 2013Observed: 3.45 ft at 10:30PM May 17, 2013Observed: 3.44 ft at 11:00PM May 17, 2013Observed: 3.44 ft at 11:30PM May 17, 2013Observed: 3.44 ft at 12:00AM May 18, 2013Observed: 3.43 ft at 12:30AM May 18, 2013Observed: 3.43 ft at 1:00AM May 18, 2013Observed: 3.44 ft at 1:30AM May 18, 2013Observed: 3.44 ft at 2:00AM May 18, 2013Observed: 3.46 ft at 2:30AM May 18, 2013Observed: 3.46 ft at 3:00AM May 18, 2013Observed: 3.46 ft at 3:30AM May 18, 2013Observed: 3.45 ft at 4:00AM May 18, 2013Observed: 3.45 ft at 4:30AM May 18, 2013Observed: 3.45 ft at 5:00AM May 18, 2013Observed: 3.45 ft at 5:30AM May 18, 2013Observed: 3.44 ft at 6:00AM May 18, 2013Observed: 3.44 ft at 6:30AM May 18, 2013Observed: 3.45 ft at 7:00AM May 18, 2013Observed: 3.45 ft at 7:30AM May 18, 2013Observed: 3.45 ft at 8:00AM May 18, 2013Observed: 3.45 ft at 8:30AM May 18, 2013Observed: 3.45 ft at 9:00AM May 18, 2013Observed: 3.44 ft at 9:30AM May 18, 2013Observed: 3.44 ft at 10:00AM May 18, 2013Observed: 3.43 ft at 10:30AM May 18, 2013Observed: 3.43 ft at 11:00AM May 18, 2013Observed: 3.43 ft at 11:30AM May 18, 2013Observed: 3.44 ft at 12:00PM May 18, 2013Observed: 3.44 ft at 12:30PM May 18, 2013Observed: 3.44 ft at 1:00PM May 18, 2013Observed: 3.44 ft at 1:30PM May 18, 2013Observed: 3.44 ft at 2:00PM May 18, 2013Observed: 3.44 ft at 2:30PM May 18, 2013Observed: 3.44 ft at 3:00PM May 18, 2013Observed: 3.43 ft at 3:30PM May 18, 2013Observed: 3.43 ft at 4:00PM May 18, 2013Observed: 3.44 ft at 4:30PM May 18, 2013Observed: 3.44 ft at 5:00PM May 18, 2013Observed: 3.44 ft at 5:30PM May 18, 2013Observed: 3.44 ft at 6:00PM May 18, 2013Observed: 3.45 ft at 6:30PM May 18, 2013Observed: 3.45 ft at 7:00PM May 18, 2013Observed: 3.45 ft at 7:30PM May 18, 2013Observed: 3.45 ft at 8:00PM May 18, 2013Observed: 3.44 ft at 8:30PM May 18, 2013Observed: 3.45 ft at 9:00PM May 18, 2013Observed: 3.44 ft at 10:30PM May 18, 2013Observed: 3.44 ft at 11:00PM May 18, 2013Forecast: 3.53 ft 5:00AM May 19, 2013Forecast: 3.5 ft 11:00AM May 19, 2013Forecast: 3.47 ft 5:00PM May 19, 2013Forecast: 3.43 ft 11:00PM May 19, 2013Forecast: 3.39 ft 5:00AM May 20, 2013Forecast: 3.36 ft 11:00AM May 20, 2013Forecast: 3.34 ft 5:00PM May 20, 2013Forecast: 3.33 ft 11:00PM May 20, 2013Forecast: 3.32 ft 5:00AM May 21, 2013Forecast: 3.31 ft 11:00AM May 21, 2013Forecast: 3.35 ft 5:00PM May 21, 2013Forecast: 3.42 ft 11:00PM May 21, 2013Forecast: 3.54 ft 5:00AM May 22, 2013Forecast: 3.68 ft 11:00AM May 22, 2013Forecast: 3.8 ft 5:00PM May 22, 2013Forecast: 3.91 ft 11:00PM May 22, 2013Forecast: 3.99 ft 5:00AM May 23, 2013Highest Forecast: 4 ft 11:00AM May 23, 2013Forecast: 3.94 ft 5:00PM May 23, 2013Forecast: 3.83 ft 11:00PM May 23, 2013USGS--Water Resources of the United StatesPHIO3(plotting HGIRG) Graph Created (12:13AM May 19, 2013)ObservedForecast (issued 11:59AM May 18)Latest observed value: 3.44 ft at 11:00 PM PDT 18-May-2013. Flood Stage is 20 ft
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About this graph
Tabular Data
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts for the Marys River near Philomath are issued routinely year-round.
Return to Area Map
Downstream Gauge Downstream Gauge - at Corvallis
Flood Categories (in feet)
Major Flood Stage:20.7
Moderate Flood Stage:0
Flood Stage:20
Action Stage:16

Historical Crests
(1) 21.53 ft on 01/19/2012
(2) 21.11 ft on 12/30/2005
(3) 20.91 ft on 01/15/1974
(4) 20.90 ft on 12/06/1981
(5) 20.89 ft on 12/16/1982
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
20.8 ABOVE 20.8 FT...EXPECT WIDESPREAD FLOODING IN PHILOMATH...ESPECIALLY ON THE SOUTH SIDE IN THE VICINITY OF CHAPEL DRIVE AND GRANGE HALL ROAD...IN CENTRAL BENTON COUNTY...AND PORTIONS OF CORVALLIS.
20.7 ABOVE 20.7 FT...EXPECT ROAD FLOODING IN PHILOMATH...ESPECIALLY IN THE SOUTH PART OF TOWN IN THE VICINITY OF CHAPEL DRIVE AND GRANGE HALL ROAD. PORTIONS OF HIGHWAY 99W IN CORVALLIS HAVE HISTORICALLY BEEN FLOODED AT THIS LEVEL. IF THE WILLAMETTE RIVER STAGE AT CORVALLIS IS AT 18 FT OR HIGHER...WIDESPREAD FLOODING OF COUNTY ROADS AND ROAD CLOUSURES CAN BE EXPECTED. IF THE WILLAMETTE STAGE AT CORVALLIS IS BELOW 18 FT...ROADS MAY STILL BE PASSABLE.
20.5 ABOVE 20.5 FT...EXPECT FLOODING OF SOME HOMES IN THE SOUTHERN PART OF CORVALLIS TO BEGIN...ESPECIALLY WHEN WILLAMETTE IS ALSO RUNNING HIGH. IN SOUTH CORVALLIS...A TRAILER PARK AND LIGHT INDUSTRIAL AREAS... INCLUDING EVANITE FIBER PLANT...BEGIN TO FLOOD. FLOODING MAY BEGIN IN THE VICINITY OF CHAPEL DRIVE AND GRANGE HALL ROAD ON THE SOUTH SIDE OF PHILOMATH. PROBLEMS WITH THE SEWERS HAVE HISTORICALLY BEGUN IN PHILOMATH AT THIS AND HIGHER STAGES.
20 ABOVE 20.0 FT...EXPECT WIDESPREAD LOW LAND AND AGRICULTURAL FLOODING. SOME STRUCTURES ALONG THE RIVER MAY BEGIN TO FLOOD.
About This Location Collapse

Latitude: 44.525000° N, Longitude: 123.334444° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 20 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 224.02 ft 244.02 ft  

Other Data Sources:
Additional Information Collapse
Archived Data 1976-2001 at USACE DataQuery
Archived Data 2001-present 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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