Tualatin River near Dilley
Critical Stages
16' - Action
17.5' - Flood
18.5' - Moderate
19.5' - Major
Latest Observation
Updated: 9:15 PM PST 12/5/25
Status: No Flooding
Stage: 11.69 ft
Flow: 0.227 kcfs
Forecast
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 10 PM 12/5 | 11.74 | 0.232 |
| 4 AM 12/6 | 12.34 | 0.291 |
| 10 AM 12/6 | 12.72 | 0.329 |
| 4 PM 12/6 | 12.72 | 0.329 |
| 10 PM 12/6 | 12.56 | 0.313 |
| 4 AM 12/7 | 12.45 | 0.302 |
| 10 AM 12/7 | 12.4 | 0.297 |
| 4 PM 12/7 | 12.45 | 0.302 |
| 10 PM 12/7 | 12.63 | 0.32 |
| 4 AM 12/8 | 12.95 | 0.353 |
| 10 AM 12/8 | 13.36 | 0.397 |
| 4 PM 12/8 | 13.94 | 0.462 |
| 10 PM 12/8 | 14.72 | 0.576 |
| 4 AM 12/9 | 15.6 | 0.76 |
| 10 AM 12/9 | 16.24 | 0.974 |
| 4 PM 12/9 | 16.54 | 1.18 |
| 10 PM 12/9 | 16.77 | 1.35 |
| 4 AM 12/10 | 16.89 | 1.5 |
| 10 AM 12/10 | 16.96 | 1.59 |
| 4 PM 12/10 | 17 | 1.64 |
| 10 PM 12/10 | 17.02 | 1.67 |
| 4 AM 12/11 | 17.02 | 1.67 |
| 10 AM 12/11 | 17 | 1.64 |
| 4 PM 12/11 | 16.95 | 1.58 |
| 10 PM 12/11 | 16.88 | 1.48 |
| 4 AM 12/12 | 16.81 | 1.4 |
| 10 AM 12/12 | 16.73 | 1.31 |
| 4 PM 12/12 | 16.64 | 1.24 |
| 10 PM 12/12 | 16.57 | 1.2 |
| 4 AM 12/13 | 16.51 | 1.16 |
| 10 AM 12/13 | 16.45 | 1.11 |
| 4 PM 12/13 | 16.38 | 1.06 |
| 10 PM 12/13 | 16.3 | 1 |
| 4 AM 12/14 | 16.18 | 0.947 |
| 10 AM 12/14 | 16.05 | 0.892 |
| 4 PM 12/14 | 15.88 | 0.839 |
| 10 PM 12/14 | 15.73 | 0.796 |
| 4 AM 12/15 | 15.61 | 0.763 |
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 9:30 PM 12/5 | 11.71 | 0.229 |
| 9:15 PM 12/5 | 11.69 | 0.227 |
| 9:00 PM 12/5 | 11.66 | 0.224 |
| 8:45 PM 12/5 | 11.64 | 0.222 |
| 8:30 PM 12/5 | 11.62 | 0.22 |
| 8:15 PM 12/5 | 11.59 | 0.218 |
| 8:00 PM 12/5 | 11.56 | 0.215 |
| 7:45 PM 12/5 | 11.53 | 0.212 |
| 7:30 PM 12/5 | 11.49 | 0.208 |
| 7:15 PM 12/5 | 11.46 | 0.206 |
| 7:00 PM 12/5 | 11.42 | 0.202 |
| 6:45 PM 12/5 | 11.38 | 0.198 |
| 6:30 PM 12/5 | 11.35 | 0.196 |
| 6:15 PM 12/5 | 11.31 | 0.192 |
| 6:00 PM 12/5 | 11.27 | 0.189 |
| 5:45 PM 12/5 | 11.23 | 0.185 |
| 5:30 PM 12/5 | 11.19 | 0.182 |
| 5:15 PM 12/5 | 11.15 | 0.178 |
| 5:00 PM 12/5 | 11.12 | 0.176 |
| 4:45 PM 12/5 | 11.08 | 0.173 |
| 4:30 PM 12/5 | 11.05 | 0.17 |
| 4:15 PM 12/5 | 11.01 | 0.167 |
| 4:00 PM 12/5 | 10.98 | 0.165 |
| 3:45 PM 12/5 | 10.95 | 0.162 |
| 3:30 PM 12/5 | 10.92 | 0.16 |
| 3:15 PM 12/5 | 10.89 | 0.157 |
| 3:00 PM 12/5 | 10.87 | 0.156 |
| 2:45 PM 12/5 | 10.85 | 0.154 |
| 2:30 PM 12/5 | 10.82 | 0.152 |
| 2:15 PM 12/5 | 10.8 | 0.151 |
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, 1962 | 18 |
| Nov 26, 1998 | 18 |
| Dec 29, 1998 | 17.99 |
| Dec 9, 2015 | 17.93 |
| Feb 20, 1982 | 17.93 |
| Jan 17, 1971 | 17.91 |
| Feb 17, 1949 | 17.9 |
Data provided by the National Weather Service.
