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Hydrograph River at a Glance Download
Johnson Creek near Sycamore Stage (ft)Flow (cfs)Highest Observation: 0 ft at 5:45AM Sep 28, 2014Highest Observation: 0 ft at 6:00AM Sep 28, 2014Highest Observation: 0 ft at 6:15AM Sep 28, 2014Highest Observation: 0 ft at 6:30AM Sep 28, 2014Highest Observation: 0 ft at 6:45AM Sep 28, 2014Highest Observation: 0 ft at 7:00AM Sep 28, 2014Highest Observation: 0 ft at 7:15AM Sep 28, 2014Highest Observation: 0 ft at 7:30AM Sep 28, 2014Highest Observation: 0 ft at 7:45AM Sep 28, 2014Highest Observation: 0 ft at 8:00AM Sep 28, 2014Highest Observation: 0 ft at 8:15AM Sep 28, 2014Highest Observation: 0 ft at 8:30AM Sep 28, 2014Highest Observation: 0 ft at 8:45AM Sep 28, 2014Highest Observation: 0 ft at 9:00AM Sep 28, 2014Highest Observation: 0 ft at 9:15AM Sep 28, 2014Highest Observation: 0 ft at 9:30AM Sep 28, 2014Highest Observation: 0 ft at 9:45AM Sep 28, 2014Highest Observation: 0 ft at 10:00AM Sep 28, 2014Highest Observation: 0 ft at 10:15AM Sep 28, 2014Highest Observation: 0 ft at 10:30AM Sep 28, 2014Highest Observation: 0 ft at 10:45AM Sep 28, 2014Highest Observation: 0 ft at 11:00AM Sep 28, 2014Highest Observation: 0 ft at 11:15AM Sep 28, 2014Highest Observation: 0 ft at 11:30AM Sep 28, 2014Highest Observation: 0 ft at 11:45AM Sep 28, 2014Highest Observation: 0 ft at 12:00PM Sep 28, 2014Highest Observation: 0 ft at 12:15PM Sep 28, 2014Highest Observation: 0 ft at 12:30PM Sep 28, 2014Highest Observation: 0 ft at 12:45PM Sep 28, 2014Highest Observation: 0 ft at 1:00PM Sep 28, 2014Highest Observation: 0 ft at 1:15PM Sep 28, 2014Highest Observation: 0 ft at 1:30PM Sep 28, 2014Highest Observation: 0 ft at 1:45PM Sep 28, 2014Highest Observation: 0 ft at 2:00PM Sep 28, 2014Highest Observation: 0 ft at 2:15PM Sep 28, 2014Highest Observation: 0 ft at 2:30PM Sep 28, 2014Highest Observation: 0 ft at 2:45PM Sep 28, 2014Highest Observation: 0 ft at 3:00PM Sep 28, 2014Highest Observation: 0 ft at 3:15PM Sep 28, 2014Highest Observation: 0 ft at 3:30PM Sep 28, 2014Highest Observation: 0 ft at 3:45PM Sep 28, 2014Highest Observation: 0 ft at 4:00PM Sep 28, 2014Highest Observation: 0 ft at 4:15PM Sep 28, 2014Highest Observation: 0 ft at 4:30PM Sep 28, 2014Highest Observation: 0 ft at 4:45PM Sep 28, 2014Highest Observation: 0 ft at 5:00PM Sep 28, 2014Highest Observation: 0 ft at 5:15PM Sep 28, 2014Highest Observation: 0 ft at 5:30PM Sep 28, 2014Highest Observation: 0 ft at 5:45PM Sep 28, 2014Highest Observation: 0 ft at 6:00PM Sep 28, 2014Highest Observation: 0 ft at 6:15PM Sep 28, 2014Highest Observation: 0 ft at 6:30PM Sep 28, 2014Highest Observation: 0 ft at 6:45PM Sep 28, 2014Highest Observation: 0 ft at 7:00PM Sep 28, 2014Highest Observation: 0 ft at 7:15PM Sep 28, 2014Highest Observation: 0 ft at 7:30PM Sep 28, 2014Highest Observation: 0 ft at 7:45PM Sep 28, 2014Highest Observation: 0 ft at 8:00PM Sep 28, 2014Highest Observation: 0 ft at 8:15PM Sep 28, 2014Highest Observation: 0 ft at 8:30PM Sep 28, 2014Highest Observation: 0 ft at 8:45PM Sep 28, 2014Highest Observation: 0 ft at 9:00PM Sep 28, 2014Highest Observation: 0 ft at 9:15PM Sep 28, 2014Highest Observation: 0 ft at 9:30PM Sep 28, 2014Highest Observation: 0 ft at 9:45PM Sep 28, 2014Highest Observation: 0 ft at 10:00PM Sep 28, 2014Highest Observation: 0 ft at 10:15PM Sep 28, 2014Highest Observation: 0 ft at 10:30PM Sep 28, 2014Highest Observation: 0 ft at 10:45PM Sep 28, 2014Highest Observation: 0 ft at 11:00PM Sep 28, 2014Highest Observation: 0 ft at 11:15PM Sep 28, 2014Highest Observation: 0 ft at 11:30PM Sep 28, 2014Highest Observation: 0 ft at 11:45PM Sep 28, 2014Highest Observation: 0 ft at 12:00AM Sep 29, 2014Highest Observation: 0 ft at 12:15AM Sep 29, 2014Highest Observation: 0 ft at 12:30AM Sep 29, 2014Highest Observation: 0 ft at 12:45AM Sep 29, 2014Highest Observation: 0 ft at 1:00AM Sep 29, 2014Highest Observation: 0 ft at 1:15AM Sep 29, 2014Highest Observation: 0 ft at 1:30AM Sep 29, 2014Highest Observation: 0 ft at 1:45AM Sep 29, 2014Highest Observation: 0 ft at 2:00AM Sep 29, 2014Highest Observation: 0 ft at 2:15AM Sep 29, 2014Highest Observation: 0 ft at 2:30AM Sep 29, 2014Highest Observation: 0 ft at 2:45AM Sep 29, 2014Highest Observation: 0 ft at 3:00AM Sep 29, 2014Highest Observation: 0 ft at 3:15AM Sep 29, 2014Highest Observation: 0 ft at 3:30AM Sep 29, 2014Highest Observation: 0 ft at 3:45AM Sep 29, 2014Highest Observation: 0 ft at 4:00AM Sep 29, 2014Highest Observation: 0 ft at 4:15AM Sep 29, 2014Highest Observation: 0 ft at 4:30AM Sep 29, 2014Highest Observation: 0 ft at 4:45AM Sep 29, 2014Highest Observation: 0 ft at 5:00AM Sep 29, 2014Highest Observation: 0 ft at 5:15AM Sep 29, 2014Highest Observation: 0 ft at 5:30AM Sep 29, 2014Highest Observation: 0 ft at 5:45AM Sep 29, 2014Highest Observation: 0 ft at 6:00AM Sep 29, 2014Highest Observation: 0 ft at 6:15AM Sep 29, 2014Highest Observation: 0 ft at 6:30AM Sep 29, 2014Highest Observation: 0 ft at 6:45AM Sep 29, 2014Highest Observation: 0 ft at 7:00AM Sep 29, 2014Highest Observation: 0 ft at 7:15AM Sep 29, 2014Highest Observation: 0 ft at 7:30AM Sep 29, 2014Highest Observation: 0 ft at 7:45AM Sep 29, 2014Highest Observation: 0 ft at 8:00AM Sep 29, 2014Highest Observation: 0 ft at 8:15AM Sep 29, 2014Highest Observation: 0 ft at 8:30AM Sep 29, 2014Highest Observation: 0 ft at 8:45AM Sep 29, 2014Highest Observation: 0 ft at 9:00AM Sep 29, 2014Highest Observation: 0 ft at 9:15AM Sep 29, 2014Highest Observation: 0 ft at 9:30AM Sep 29, 2014Highest Observation: 0 ft at 9:45AM Sep 29, 2014Highest Observation: 0 ft at 10:00AM Sep 29, 2014Highest Observation: 0 ft at 10:15AM Sep 29, 2014Highest Observation: 0 ft at 10:30AM Sep 29, 2014Highest Observation: 0 ft at 10:45AM Sep 29, 2014Highest Observation: 0 ft at 11:00AM Sep 29, 2014Highest Observation: 0 ft at 11:15AM Sep 29, 2014Highest Observation: 0 ft at 11:30AM Sep 29, 2014Highest Observation: 0 ft at 11:45AM Sep 29, 2014Highest Observation: 0 ft at 12:00PM Sep 29, 2014Highest Observation: 0 ft at 12:15PM Sep 29, 2014Highest Observation: 0 ft at 12:30PM Sep 29, 2014Highest Observation: 0 ft at 12:45PM Sep 29, 2014Highest Observation: 0 ft at 1:00PM Sep 29, 2014Highest Observation: 0 ft at 1:15PM Sep 29, 2014Highest Observation: 0 ft at 1:30PM Sep 29, 2014Highest Observation: 0 ft at 1:45PM Sep 29, 2014Highest Observation: 0 ft at 2:00PM Sep 29, 2014Highest Observation: 0 ft at 2:15PM Sep 29, 2014Highest Observation: 0 ft at 2:30PM Sep 29, 2014Highest Observation: 0 ft at 2:45PM Sep 29, 2014Highest Observation: 0 ft at 3:00PM Sep 29, 2014Highest Observation: 0 ft at 3:15PM Sep 29, 2014Highest Observation: 0 ft at 3:30PM Sep 29, 2014Highest Observation: 0 ft at 3:45PM Sep 29, 2014Highest Observation: 0 ft at 4:00PM Sep 29, 2014Highest Observation: 0 ft at 4:15PM Sep 29, 2014Highest Observation: 0 ft at 4:30PM Sep 29, 2014Highest Observation: 0 ft at 4:45PM Sep 29, 2014Highest Observation: 0 ft at 5:00PM Sep 29, 2014Highest Observation: 0 ft at 5:15PM Sep 29, 2014Highest Observation: 0 ft at 5:30PM Sep 29, 2014Highest Observation: 0 ft at 5:45PM Sep 29, 2014Highest Observation: 0 ft at 6:00PM Sep 29, 2014Highest Observation: 0 ft at 6:15PM Sep 29, 2014Highest Observation: 0 ft at 6:30PM Sep 29, 2014Highest Observation: 0 ft at 6:45PM Sep 29, 2014Highest Observation: 0 ft at 7:00PM Sep 29, 2014Highest Observation: 0 ft at 7:15PM Sep 29, 2014Highest Observation: 0 ft at 7:30PM Sep 29, 2014Highest Observation: 0 ft at 7:45PM Sep 29, 2014Highest Observation: 0 ft at 8:00PM Sep 29, 2014Highest Observation: 0 ft at 8:15PM Sep 29, 2014Highest Observation: 0 ft at 8:30PM Sep 29, 2014Highest Observation: 0 ft at 8:45PM Sep 29, 2014Highest Observation: 0 ft at 9:00PM Sep 29, 2014Highest Observation: 0 ft at 9:15PM Sep 29, 2014Highest Observation: 0 ft at 9:30PM Sep 29, 2014Highest Observation: 0 ft at 9:45PM Sep 29, 2014Highest Observation: 0 ft at 10:00PM Sep 29, 2014Highest Observation: 0 ft at 10:15PM Sep 29, 2014Highest Observation: 0 ft at 10:30PM Sep 29, 2014Highest Observation: 0 ft at 10:45PM Sep 29, 2014Highest Observation: 0 ft at 11:00PM Sep 29, 2014Highest Observation: 0 ft at 11:15PM Sep 29, 2014Highest Observation: 0 ft at 11:30PM Sep 29, 2014Highest Observation: 0 ft at 11:45PM Sep 29, 2014Highest Observation: 0 ft at 12:00AM Sep 30, 2014Highest Observation: 0 ft at 12:15AM Sep 30, 2014Highest Observation: 0 ft at 12:30AM Sep 30, 2014Highest Observation: 0 ft at 12:45AM Sep 30, 2014Highest Observation: 0 ft at 1:00AM Sep 30, 2014Highest Observation: 0 ft at 1:15AM Sep 30, 2014Highest Observation: 0 ft at 1:30AM Sep 30, 2014Highest Observation: 0 ft at 1:45AM Sep 30, 2014Highest Observation: 0 ft at 2:00AM Sep 30, 2014Highest Observation: 0 ft at 2:15AM Sep 30, 2014Highest Observation: 0 ft at 2:30AM Sep 30, 2014Highest Observation: 0 ft at 2:45AM Sep 30, 2014Highest Observation: 0 ft at 3:00AM Sep 30, 2014Highest Observation: 0 ft at 3:15AM Sep 30, 2014Highest Observation: 0 ft at 3:30AM Sep 30, 2014Highest Observation: 0 ft at 3:45AM Sep 30, 2014Highest Observation: 0 ft at 4:00AM Sep 30, 2014Highest Observation: 0 ft at 4:15AM Sep 30, 2014Highest Observation: 0 ft at 4:30AM Sep 30, 2014Highest Observation: 0 ft at 4:45AM Sep 30, 2014Highest Observation: 0 ft at 5:00AM Sep 30, 2014Highest Observation: 0 ft at 5:15AM Sep 30, 2014Highest Observation: 0 ft at 5:30AM Sep 30, 2014Highest Observation: 0 ft at 5:45AM Sep 30, 2014Highest Observation: 0 ft at 6:00AM Sep 30, 2014Highest Observation: 0 ft at 6:15AM Sep 30, 2014Highest Observation: 0 ft at 6:30AM Sep 30, 2014Highest Forecast: 1.5 ft 11:00AM Sep 30, 2014Forecast: 1.44 ft 5:00PM Sep 30, 2014Forecast: 1.4 ft 11:00PM Sep 30, 2014Forecast: 1.37 ft 5:00AM Oct 01, 2014Forecast: 1.32 ft 11:00AM Oct 01, 2014Forecast: 1.29 ft 5:00PM Oct 01, 2014Forecast: 1.27 ft 11:00PM Oct 01, 2014Forecast: 1.26 ft 5:00AM Oct 02, 2014Forecast: 1.26 ft 11:00AM Oct 02, 2014Forecast: 1.26 ft 5:00PM Oct 02, 2014Forecast: 1.26 ft 11:00PM Oct 02, 2014Forecast: 1.26 ft 5:00AM Oct 03, 2014Forecast: 1.26 ft 11:00AM Oct 03, 2014Forecast: 1.26 ft 5:00PM Oct 03, 2014Forecast: 1.26 ft 11:00PM Oct 03, 2014Forecast: 1.26 ft 5:00AM Oct 04, 2014Forecast: 1.26 ft 11:00AM Oct 04, 2014Forecast: 1.26 ft 5:00PM Oct 04, 2014Forecast: 1.26 ft 11:00PM Oct 04, 2014Forecast: 1.26 ft 5:00AM Oct 05, 2014USGS--Water Resources of the United StatesSYCO3(plotting HGIRG) Graph Created (6:49AM Sep 30, 2014)ObservedForecast (issued 7:45AM Sep 29)Latest observed value: 0 ft at 6:30 AM PDT 30-Sep-2014. Flood Stage is 11 ft
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About this graph
Tabular Data (UTC)
Tabular Data (PDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts for the Johnson Creek near Sycamore are issued routinely year-round.
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Upstream Gauge - at Gresham Upstream Gauge Downstream Gauge Downstream Gauge - at Milwaukie
Flood Categories (in feet)
Major Flood Stage:14
Moderate Flood Stage:0
Flood Stage:11
Action Stage:10

Historical Crests
(1) 15.30 ft on 11/19/1996
(2) 14.69 ft on 01/02/2009
(3) 14.68 ft on 12/22/1964
(4) 14.50 ft on 12/01/1937
(5) 14.28 ft on 02/07/1996
Show More Historical Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.33 ft on 08/14/1940
(2) 0.65 ft on 08/18/1959
(3) 0.70 ft on 09/06/1955
Show More Low Water Records
Zoom Level:16
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Gauge LocationGauge Map Marker
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
If you notice any errors in the below information, please contact our Webmaster
14 Above 14 ft, Expect widespread flooding of residential and commercial areas along johnson creek.
13 Above 13 ft, Expect flooding to begin at numerous locations along johnson creek. Evacuations of several homes have historically taken place at this and higher stages.
11 Above 11 ft, Minor flooding begins along johnson creek from se 92nd st to se 122nd st and between johnson creek and se harold st.
About This Location Collapse

Latitude: 45.477500° N, Longitude: 122.508333° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 11 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 228.47 ft 239.47 ft  

Current/Historical Observations:

Additional Information Collapse
Archived/Historical Data at USACE DataQuery
10-day Forecast/Trend, Northwest River Forecast Center
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Hydrologic Resources Additional Resources
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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, OR 97230-1089
(503) 261-9246
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Page last modified: 27-Aug-2014 7:09 PM
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