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Tualatin River near Dilley
Critical Stages
16' - Action
17.5' - Flood
18.5' - Moderate
19.5' - Major
Latest Observation
Updated: 7:00 AM PST 12/16/25
Status: No Flooding
Stage: 15.67 ft
Flow: 0.779 kcfs
Forecast
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 10 AM 12/16 | 15.68 | 0.782 |
| 4 PM 12/16 | 15.69 | 0.785 |
| 10 PM 12/16 | 15.66 | 0.777 |
| 4 AM 12/17 | 15.79 | 0.813 |
| 10 AM 12/17 | 15.94 | 0.858 |
| 4 PM 12/17 | 16.17 | 0.942 |
| 10 PM 12/17 | 16.3 | 1 |
| 4 AM 12/18 | 16.34 | 1.03 |
| 10 AM 12/18 | 16.32 | 1.02 |
| 4 PM 12/18 | 16.3 | 1 |
| 10 PM 12/18 | 16.35 | 1.04 |
| 4 AM 12/19 | 16.52 | 1.16 |
| 10 AM 12/19 | 16.77 | 1.35 |
| 4 PM 12/19 | 16.89 | 1.5 |
| 10 PM 12/19 | 16.94 | 1.56 |
| 4 AM 12/20 | 16.92 | 1.53 |
| 10 AM 12/20 | 16.85 | 1.45 |
| 4 PM 12/20 | 16.75 | 1.32 |
| 10 PM 12/20 | 16.58 | 1.2 |
| 4 AM 12/21 | 16.43 | 1.1 |
| 10 AM 12/21 | 16.31 | 1.01 |
| 4 PM 12/21 | 16.19 | 0.951 |
| 10 PM 12/21 | 16.08 | 0.903 |
| 4 AM 12/22 | 16 | 0.877 |
| 10 AM 12/22 | 15.97 | 0.867 |
| 4 PM 12/22 | 15.98 | 0.87 |
| 10 PM 12/22 | 16.03 | 0.886 |
| 4 AM 12/23 | 16.1 | 0.911 |
| 10 AM 12/23 | 16.15 | 0.933 |
| 4 PM 12/23 | 16.17 | 0.942 |
| 10 PM 12/23 | 16.16 | 0.938 |
| 4 AM 12/24 | 16.12 | 0.92 |
| 10 AM 12/24 | 16.07 | 0.899 |
| 4 PM 12/24 | 16 | 0.877 |
| 10 PM 12/24 | 15.93 | 0.855 |
| 4 AM 12/25 | 15.87 | 0.836 |
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 7:00 AM 12/16 | 15.67 | 0.779 |
| 6:45 AM 12/16 | 15.67 | 0.779 |
| 6:30 AM 12/16 | 15.67 | 0.779 |
| 6:15 AM 12/16 | 15.68 | 0.782 |
| 6:00 AM 12/16 | 15.67 | 0.779 |
| 5:45 AM 12/16 | 15.67 | 0.779 |
| 5:30 AM 12/16 | 15.67 | 0.779 |
| 5:15 AM 12/16 | 15.66 | 0.777 |
| 5:00 AM 12/16 | 15.67 | 0.779 |
| 4:45 AM 12/16 | 15.67 | 0.779 |
| 4:30 AM 12/16 | 15.66 | 0.777 |
| 4:15 AM 12/16 | 15.66 | 0.777 |
| 4:00 AM 12/16 | 15.66 | 0.777 |
| 3:45 AM 12/16 | 15.66 | 0.777 |
| 3:30 AM 12/16 | 15.66 | 0.777 |
| 3:15 AM 12/16 | 15.66 | 0.777 |
| 3:00 AM 12/16 | 15.66 | 0.777 |
| 2:45 AM 12/16 | 15.66 | 0.777 |
| 2:30 AM 12/16 | 15.66 | 0.777 |
| 2:15 AM 12/16 | 15.65 | 0.774 |
| 2:00 AM 12/16 | 15.65 | 0.774 |
| 1:45 AM 12/16 | 15.65 | 0.774 |
| 1:30 AM 12/16 | 15.65 | 0.774 |
| 1:15 AM 12/16 | 15.64 | 0.771 |
| 1:00 AM 12/16 | 15.64 | 0.771 |
| 12:45 AM 12/16 | 15.64 | 0.771 |
| 12:30 AM 12/16 | 15.64 | 0.771 |
| 12:15 AM 12/16 | 15.63 | 0.768 |
| 12:00 AM 12/16 | 15.63 | 0.768 |
| 11:45 PM 12/15 | 15.63 | 0.768 |
19.5' -
expect 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' -
a few homes are threatened by floodwaters. Numerous roads are flooded and may be closed, and widespread lowland agricultural flooding occurs.
17.5' -
several minor roads begin to flood and may be closed. Widespread lowland agricultural flooding occurs at this and higher stages.
17' -
expect inundation of low areas, including some farmland, along the river channel.
| Date | Stage (ft) |
|---|---|
| Dec 22, 1964 | 19.34 |
| Jan 21, 1972 | 19.27 |
| Feb 8, 1996 | 19.06 |
| Dec 5, 2007 | 19 |
| Dec 22, 1955 | 18.8 |
| Dec 14, 1977 | 18.63 |
| Jan 16, 1974 | 18.53 |
| Apr 5, 1991 | 18.47 |
| Dec 13, 1966 | 18.42 |
| Dec 26, 1980 | 18.2 |
| Feb 1, 1987 | 18.19 |
| Jan 15, 1988 | 18.14 |
| Dec 30, 1996 | 18.02 |
| Nov 26, 1998 | 18 |
| Nov 26, 1962 | 18 |
| Dec 29, 1998 | 17.99 |
| Feb 20, 1982 | 17.93 |
| Dec 9, 2015 | 17.93 |
| Jan 17, 1971 | 17.91 |
| Feb 17, 1949 | 17.9 |
Data provided by the National Weather Service.
