Johnson Creek near Sycamore, OR
River level and flood forecast · Multnomah County
The river is 9.8 ft below flood stage (11 ft).
Forecast to rise to 1.6 ft Mon 5 PM, below the 11 ft flood stage.
Flow: 2 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Mon, Oct 12, 8:22 AM. Forecasts change as rain falls and as upstream water arrives.
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An email when the National Weather Service forecasts Johnson Creek near Sycamore to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 14 ft |
| Moderate flood stage | 13 ft |
| Flood stage | 11 ft |
| Action stage | 10 ft |
| Record crest (December 7, 2015) | 15.33 ft |
What floods at each level
From the National Weather Service, highest first.
- 14 ftexpect widespread flooding of residential and commercial areas along Johnson Creek.
- 13 ftexpect flooding to begin at numerous locations along Johnson Creek. Evacuations of several homes have historically taken place at this and higher stages.
- 11 ftminor flooding begins along Johnson Creek between SE 92nd Street to SE 122nd Street and between Johnson Creek and SE Harold Street.
Highest crests on record
- 15.33 ft — December 7, 2015
- 15.3 ft — November 19, 1996
- 14.69 ft — January 2, 2009
- 14.68 ft — December 22, 1964
- 14.5 ft — December 1, 1937
Recent crests: 12.98 ft (December 19, 2025) · 11.3 ft (December 9, 2025) · 11.33 ft (January 13, 2021) · 10.73 ft (February 5, 2017) · 15.33 ft (December 7, 2015)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (SYCO3); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.