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This probabilistic forecast is issued by the Northwest River Forecast Center.
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About this graph
Forecasts for the Johnson Creek near Sycamore are issued routinely year-round.
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Zoom Level:16
Flood Categories (in feet)
Major Flood Stage: 14
Moderate Flood Stage: 0
Flood Stage: 11
Action Stage: 10
Low Stage (in feet): -9999

Historic Crests
(1) 15.33 ft on 12/07/2015
(2) 15.30 ft on 11/19/1996
(3) 14.69 ft on 01/02/2009
(4) 14.68 ft on 12/22/1964
(5) 14.50 ft on 12/01/1937
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(P): Preliminary values subject to further review.

Recent Crests
(1) 11.33 ft on 01/13/2021
(2) 10.73 ft on 02/05/2017
(3) 15.33 ft on 12/07/2015
(4) 13.21 ft on 01/19/2012
(5) 14.69 ft on 01/02/2009
Show More Recent 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
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Gauge LocationGauge Map Marker
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 expect widespread flooding of residential and commercial areas along Johnson Creek.
13 expect flooding to begin at numerous locations along Johnson Creek. Evacuations of several homes have historically taken place at this and higher stages.
11 minor flooding begins along Johnson Creek between SE 92nd Street to SE 122nd Street and between Johnson Creek and SE Harold Street.
(1) Downstream view
(2) Downstream view with staff gage
(3) Gage house
(4) Upstream view

Other Real-time and/or Archive Data Sources:

Additional Information Collapse
Archived/Historical Data at USACE DataQuery
10-day Forecast/Trend, Northwest River Forecast Center
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: 30-Oct-2020 4:07 PM
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