Yakima River at Umtanum
Critical Stages
33.5' - Action
35.5' - Flood
38' - Moderate
39' - Major
Latest Observation
Updated: 9:15 AM PST 12/15/25
Status: No Flooding
Stage: 32.88 ft
Flow: 4.31 kcfs
Forecast
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 4 PM 12/15 | 32.8 | 4.13 |
| 10 PM 12/15 | 32.81 | 4.15 |
| 4 AM 12/16 | 32.87 | 4.29 |
| 10 AM 12/16 | 32.94 | 4.46 |
| 4 PM 12/16 | 33 | 4.6 |
| 10 PM 12/16 | 33.17 | 5.02 |
| 4 AM 12/17 | 33.49 | 5.87 |
| 10 AM 12/17 | 33.96 | 7.24 |
| 4 PM 12/17 | 34.53 | 9.11 |
| 10 PM 12/17 | 34.94 | 10.6 |
| 4 AM 12/18 | 34.83 | 10.2 |
| 10 AM 12/18 | 34.47 | 8.9 |
| 4 PM 12/18 | 34.09 | 7.65 |
| 10 PM 12/18 | 33.78 | 6.7 |
| 4 AM 12/19 | 33.6 | 6.18 |
| 10 AM 12/19 | 33.54 | 6.01 |
| 4 PM 12/19 | 33.53 | 5.98 |
| 10 PM 12/19 | 33.49 | 5.87 |
| 4 AM 12/20 | 33.39 | 5.6 |
| 10 AM 12/20 | 33.26 | 5.25 |
| 4 PM 12/20 | 33.09 | 4.82 |
| 10 PM 12/20 | 32.92 | 4.41 |
| 4 AM 12/21 | 32.75 | 4.01 |
| 10 AM 12/21 | 32.61 | 3.7 |
| 4 PM 12/21 | 32.49 | 3.45 |
| 10 PM 12/21 | 32.39 | 3.24 |
| 4 AM 12/22 | 32.3 | 3.06 |
| 10 AM 12/22 | 32.23 | 2.93 |
| 4 PM 12/22 | 32.17 | 2.82 |
| 10 PM 12/22 | 32.11 | 2.7 |
| 4 AM 12/23 | 32.07 | 2.63 |
| 10 AM 12/23 | 32.03 | 2.56 |
| 4 PM 12/23 | 32 | 2.51 |
| 10 PM 12/23 | 31.97 | 2.45 |
| 4 AM 12/24 | 31.95 | 2.42 |
| 10 AM 12/24 | 31.93 | 2.38 |
| 4 PM 12/24 | 31.92 | 2.37 |
| 10 PM 12/24 | 31.9 | 2.33 |
| 4 AM 12/25 | 31.89 | 2.32 |
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 9:15 AM 12/15 | 32.88 | 4.31 |
| 9:00 AM 12/15 | 32.89 | 4.34 |
| 8:45 AM 12/15 | 32.89 | 4.34 |
| 8:30 AM 12/15 | 32.9 | 4.36 |
| 8:15 AM 12/15 | 32.89 | 4.34 |
| 8:00 AM 12/15 | 32.9 | 4.36 |
| 7:45 AM 12/15 | 32.9 | 4.36 |
| 7:30 AM 12/15 | 32.91 | 4.38 |
| 7:15 AM 12/15 | 32.91 | 4.38 |
| 7:00 AM 12/15 | 32.91 | 4.38 |
| 6:45 AM 12/15 | 32.92 | 4.41 |
| 6:30 AM 12/15 | 32.93 | 4.43 |
| 6:15 AM 12/15 | 32.93 | 4.43 |
| 6:00 AM 12/15 | 32.93 | 4.43 |
| 5:45 AM 12/15 | 32.94 | 4.46 |
| 5:30 AM 12/15 | 32.95 | 4.48 |
| 5:15 AM 12/15 | 32.95 | 4.48 |
| 5:00 AM 12/15 | 32.96 | 4.5 |
| 4:45 AM 12/15 | 32.96 | 4.5 |
| 4:30 AM 12/15 | 32.96 | 4.5 |
| 4:15 AM 12/15 | 32.97 | 4.53 |
| 4:00 AM 12/15 | 32.97 | 4.53 |
| 3:45 AM 12/15 | 32.98 | 4.55 |
| 3:30 AM 12/15 | 32.98 | 4.55 |
| 3:15 AM 12/15 | 32.99 | 4.58 |
| 3:00 AM 12/15 | 33 | 4.6 |
| 2:45 AM 12/15 | 33 | 4.6 |
| 2:30 AM 12/15 | 33 | 4.6 |
| 2:15 AM 12/15 | 33.01 | 4.62 |
| 2:00 AM 12/15 | 33.02 | 4.65 |
39' -
This will produce major flooding of residential and commercial areas, highways and pastures from Teanaway downstream to Ellensburg, especially in the town of Thorp.
38' -
At this level, flooding of roads and pastures in the vicinity of the river will occur. The Ellensburg water supply pumphouse is threatened.
36.5' -
There will be flooding in pastures along the river.
35.5' -
At this level, there will be minor flooding in areas along the river from Teanaway to Ellensburg including Irene Rienhart Park in Ellensburg.
33.5' -
At this stage, the river is near bankfull at Ellensburg. Lowland flooding is possible in the low areas along the river.
| Date | Stage (ft) |
|---|---|
| Nov 15, 1906 | 41.1 |
| May 29, 1948 | 38.98 |
| Feb 9, 1996 | 38.77 |
| Nov 25, 1990 | 37.93 |
| Jan 8, 2009 | 37.84 |
| Dec 3, 1977 | 37.63 |
| Nov 23, 1959 | 37.08 |
| Jan 17, 2011 | 36.69 |
| May 16, 2011 | 36.5 |
| Dec 10, 2015 | 35.7 |
| Feb 16, 2016 | 35.67 |
| Jan 31, 1965 | 35.22 |
| Dec 30, 1999 | 34.44 |
Data provided by the National Weather Service.
