Tualatin River near Dilley
Critical Stages
16' - Action
17.5' - Flood
18.5' - Moderate
19.5' - Major
Latest Observation
Updated: 3:15 PM PST 12/15/25
Status: No Flooding
Stage: 15.39 ft
Flow: 0.705 kcfs
Forecast
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 4 PM 12/15 | 15.42 | 0.713 |
| 10 PM 12/15 | 15.77 | 0.807 |
| 4 AM 12/16 | 16.19 | 0.951 |
| 10 AM 12/16 | 16.36 | 1.05 |
| 4 PM 12/16 | 16.37 | 1.05 |
| 10 PM 12/16 | 16.32 | 1.02 |
| 4 AM 12/17 | 16.27 | 0.987 |
| 10 AM 12/17 | 16.25 | 0.978 |
| 4 PM 12/17 | 16.32 | 1.02 |
| 10 PM 12/17 | 16.39 | 1.07 |
| 4 AM 12/18 | 16.4 | 1.07 |
| 10 AM 12/18 | 16.36 | 1.05 |
| 4 PM 12/18 | 16.34 | 1.03 |
| 10 PM 12/18 | 16.39 | 1.07 |
| 4 AM 12/19 | 16.56 | 1.19 |
| 10 AM 12/19 | 16.79 | 1.37 |
| 4 PM 12/19 | 16.91 | 1.52 |
| 10 PM 12/19 | 16.97 | 1.6 |
| 4 AM 12/20 | 16.95 | 1.58 |
| 10 AM 12/20 | 16.88 | 1.48 |
| 4 PM 12/20 | 16.77 | 1.35 |
| 10 PM 12/20 | 16.62 | 1.23 |
| 4 AM 12/21 | 16.46 | 1.12 |
| 10 AM 12/21 | 16.34 | 1.03 |
| 4 PM 12/21 | 16.23 | 0.969 |
| 10 PM 12/21 | 16.12 | 0.92 |
| 4 AM 12/22 | 16.05 | 0.892 |
| 10 AM 12/22 | 16.01 | 0.88 |
| 4 PM 12/22 | 16.03 | 0.886 |
| 10 PM 12/22 | 16.07 | 0.899 |
| 4 AM 12/23 | 16.13 | 0.925 |
| 10 AM 12/23 | 16.18 | 0.947 |
| 4 PM 12/23 | 16.2 | 0.956 |
| 10 PM 12/23 | 16.18 | 0.947 |
| 4 AM 12/24 | 16.14 | 0.929 |
| 10 AM 12/24 | 16.1 | 0.911 |
| 4 PM 12/24 | 16.04 | 0.889 |
| 10 PM 12/24 | 15.97 | 0.867 |
| 4 AM 12/25 | 15.9 | 0.845 |
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 3:15 PM 12/15 | 15.39 | 0.705 |
| 3:00 PM 12/15 | 15.39 | 0.705 |
| 2:45 PM 12/15 | 15.38 | 0.703 |
| 2:30 PM 12/15 | 15.38 | 0.703 |
| 2:15 PM 12/15 | 15.36 | 0.698 |
| 2:00 PM 12/15 | 15.36 | 0.698 |
| 1:45 PM 12/15 | 15.35 | 0.696 |
| 1:30 PM 12/15 | 15.34 | 0.693 |
| 1:15 PM 12/15 | 15.33 | 0.691 |
| 1:00 PM 12/15 | 15.32 | 0.688 |
| 12:45 PM 12/15 | 15.32 | 0.688 |
| 12:30 PM 12/15 | 15.31 | 0.686 |
| 12:15 PM 12/15 | 15.3 | 0.684 |
| 12:00 PM 12/15 | 15.3 | 0.684 |
| 11:45 AM 12/15 | 15.29 | 0.682 |
| 11:30 AM 12/15 | 15.28 | 0.679 |
| 11:15 AM 12/15 | 15.28 | 0.679 |
| 11:00 AM 12/15 | 15.27 | 0.677 |
| 10:45 AM 12/15 | 15.26 | 0.675 |
| 10:30 AM 12/15 | 15.26 | 0.675 |
| 10:15 AM 12/15 | 15.26 | 0.675 |
| 10:00 AM 12/15 | 15.25 | 0.673 |
| 9:45 AM 12/15 | 15.25 | 0.673 |
| 9:30 AM 12/15 | 15.25 | 0.673 |
| 9:15 AM 12/15 | 15.24 | 0.67 |
| 9:00 AM 12/15 | 15.24 | 0.67 |
| 8:45 AM 12/15 | 15.24 | 0.67 |
| 8:30 AM 12/15 | 15.24 | 0.67 |
| 8:15 AM 12/15 | 15.24 | 0.67 |
| 8:00 AM 12/15 | 15.24 | 0.67 |
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.
