Tualatin River near Dilley, OR
River level and flood forecast · Washington County
The river is 6.2 ft below flood stage (17.5 ft).
Forecast to fall to 11.0 ft by Mon, Oct 19, 5 PM.
Flow: 189 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Mon, Oct 12, 8:24 AM. Forecasts change as rain falls and as upstream water arrives.
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An email when the National Weather Service forecasts Tualatin River near Dilley to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 19.5 ft |
| Moderate flood stage | 18.5 ft |
| Flood stage | 17.5 ft |
| Action stage | 16 ft |
| Record crest (January 21, 1972) | 19.27 ft |
What floods at each level
From the National Weather Service, highest first.
- 19.5 ftexpect major and widespread flooding in the upper Tualatin Valley, with numerou road closures likely and several homes flooded or isolated due to surrounding flood waters.
- 18.5 fta few homes are threatened by floodwaters. Numerous roads are flooded and may be closed, and widespread lowland agricultural flooding occurs.
- 17.5 ftseveral minor roads begin to flood and may be closed. Widespread lowland agricultural flooding occurs at this and higher stages.
- 17 ftexpect inundation of low areas, including some farmland, along the river channel.
Highest crests on record
- 19.27 ft — January 21, 1972
- 19.06 ft — February 8, 1996
- 19 ft — December 5, 2007
- 18.8 ft — December 22, 1955
- 18.63 ft — December 14, 1977
Recent crests: 17.79 ft (December 19, 2025) · 17.67 ft (November 25, 2016) · 17.93 ft (December 9, 2015) · 17.57 ft (March 30, 2012) · 17.48 ft (January 9, 2009)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (DLLO3); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.