Tualatin River near Dilley
Critical Stages
16' - Action
17.5' - Flood
18.5' - Moderate
19.5' - Major
Latest Observation
Updated: 6:15 PM PST 12/14/25
Status: No Flooding
Stage: 15.53 ft
Flow: 0.741 kcfs
Forecast
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 10 PM 12/14 | 15.52 | 0.739 |
| 4 AM 12/15 | 15.42 | 0.713 |
| 10 AM 12/15 | 15.38 | 0.703 |
| 4 PM 12/15 | 15.46 | 0.723 |
| 10 PM 12/15 | 15.67 | 0.779 |
| 4 AM 12/16 | 15.94 | 0.858 |
| 10 AM 12/16 | 16.08 | 0.903 |
| 4 PM 12/16 | 16.09 | 0.907 |
| 10 PM 12/16 | 16.06 | 0.896 |
| 4 AM 12/17 | 16.09 | 0.907 |
| 10 AM 12/17 | 16.19 | 0.951 |
| 4 PM 12/17 | 16.34 | 1.03 |
| 10 PM 12/17 | 16.45 | 1.11 |
| 4 AM 12/18 | 16.48 | 1.13 |
| 10 AM 12/18 | 16.45 | 1.11 |
| 4 PM 12/18 | 16.44 | 1.1 |
| 10 PM 12/18 | 16.48 | 1.13 |
| 4 AM 12/19 | 16.64 | 1.24 |
| 10 AM 12/19 | 16.81 | 1.4 |
| 4 PM 12/19 | 16.91 | 1.52 |
| 10 PM 12/19 | 16.94 | 1.56 |
| 4 AM 12/20 | 16.91 | 1.52 |
| 10 AM 12/20 | 16.85 | 1.45 |
| 4 PM 12/20 | 16.75 | 1.32 |
| 10 PM 12/20 | 16.6 | 1.22 |
| 4 AM 12/21 | 16.48 | 1.13 |
| 10 AM 12/21 | 16.39 | 1.07 |
| 4 PM 12/21 | 16.32 | 1.02 |
| 10 PM 12/21 | 16.27 | 0.987 |
| 4 AM 12/22 | 16.22 | 0.965 |
| 10 AM 12/22 | 16.21 | 0.96 |
| 4 PM 12/22 | 16.22 | 0.965 |
| 10 PM 12/22 | 16.24 | 0.974 |
| 4 AM 12/23 | 16.24 | 0.974 |
| 10 AM 12/23 | 16.24 | 0.974 |
| 4 PM 12/23 | 16.22 | 0.965 |
| 10 PM 12/23 | 16.18 | 0.947 |
| 4 AM 12/24 | 16.14 | 0.929 |
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 6:15 PM 12/14 | 15.53 | 0.741 |
| 6:00 PM 12/14 | 15.54 | 0.744 |
| 5:45 PM 12/14 | 15.55 | 0.747 |
| 5:30 PM 12/14 | 15.56 | 0.749 |
| 5:15 PM 12/14 | 15.55 | 0.747 |
| 5:00 PM 12/14 | 15.57 | 0.752 |
| 4:45 PM 12/14 | 15.58 | 0.755 |
| 4:30 PM 12/14 | 15.59 | 0.758 |
| 4:15 PM 12/14 | 15.6 | 0.76 |
| 4:00 PM 12/14 | 15.61 | 0.763 |
| 3:45 PM 12/14 | 15.61 | 0.763 |
| 3:30 PM 12/14 | 15.61 | 0.763 |
| 3:15 PM 12/14 | 15.62 | 0.766 |
| 3:00 PM 12/14 | 15.62 | 0.766 |
| 2:45 PM 12/14 | 15.63 | 0.768 |
| 2:30 PM 12/14 | 15.64 | 0.771 |
| 2:15 PM 12/14 | 15.65 | 0.774 |
| 2:00 PM 12/14 | 15.66 | 0.777 |
| 1:45 PM 12/14 | 15.66 | 0.777 |
| 1:30 PM 12/14 | 15.67 | 0.779 |
| 1:15 PM 12/14 | 15.68 | 0.782 |
| 1:00 PM 12/14 | 15.67 | 0.779 |
| 12:45 PM 12/14 | 15.69 | 0.785 |
| 12:30 PM 12/14 | 15.7 | 0.788 |
| 12:15 PM 12/14 | 15.7 | 0.788 |
| 12:00 PM 12/14 | 15.7 | 0.788 |
| 11:45 AM 12/14 | 15.71 | 0.79 |
| 11:30 AM 12/14 | 15.72 | 0.793 |
| 11:15 AM 12/14 | 15.73 | 0.796 |
| 11:00 AM 12/14 | 15.74 | 0.799 |
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.
