Yakima River at Umtanum
Critical Stages
33.5' - Action
35.5' - Flood
38' - Moderate
39' - Major
Latest Observation
Updated: 7:15 AM PST 12/6/25
Status: No Flooding
Stage: 30.79 ft
Flow: 0.842 kcfs
Forecast
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 10 AM 12/6 | 30.93 | 0.987 |
| 4 PM 12/6 | 31.12 | 1.2 |
| 10 PM 12/6 | 31.42 | 1.59 |
| 4 AM 12/7 | 31.73 | 2.05 |
| 10 AM 12/7 | 31.82 | 2.2 |
| 4 PM 12/7 | 31.79 | 2.15 |
| 10 PM 12/7 | 31.72 | 2.04 |
| 4 AM 12/8 | 31.65 | 1.93 |
| 10 AM 12/8 | 31.62 | 1.88 |
| 4 PM 12/8 | 31.7 | 2.01 |
| 10 PM 12/8 | 32.01 | 2.52 |
| 4 AM 12/9 | 32.57 | 3.62 |
| 10 AM 12/9 | 33.21 | 5.12 |
| 4 PM 12/9 | 33.82 | 6.82 |
| 10 PM 12/9 | 34.21 | 8.04 |
| 4 AM 12/10 | 34.44 | 8.8 |
| 10 AM 12/10 | 34.68 | 9.64 |
| 4 PM 12/10 | 34.99 | 10.8 |
| 10 PM 12/10 | 35.26 | 11.8 |
| 4 AM 12/11 | 35.37 | 12.2 |
| 10 AM 12/11 | 35.31 | 12 |
| 4 PM 12/11 | 35.17 | 11.5 |
| 10 PM 12/11 | 35.03 | 10.9 |
| 4 AM 12/12 | 34.85 | 10.3 |
| 10 AM 12/12 | 34.68 | 9.64 |
| 4 PM 12/12 | 34.53 | 9.11 |
| 10 PM 12/12 | 34.39 | 8.63 |
| 4 AM 12/13 | 34.26 | 8.2 |
| 10 AM 12/13 | 34.1 | 7.68 |
| 4 PM 12/13 | 33.94 | 7.18 |
| 10 PM 12/13 | 33.75 | 6.61 |
| 4 AM 12/14 | 33.57 | 6.09 |
| 10 AM 12/14 | 33.4 | 5.62 |
| 4 PM 12/14 | 33.25 | 5.23 |
| 10 PM 12/14 | 33.1 | 4.84 |
| 4 AM 12/15 | 32.96 | 4.5 |
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 7:15 AM 12/6 | 30.79 | 0.842 |
| 7:00 AM 12/6 | 30.79 | 0.842 |
| 6:45 AM 12/6 | 30.79 | 0.842 |
| 6:30 AM 12/6 | 30.78 | 0.832 |
| 6:15 AM 12/6 | 30.78 | 0.832 |
| 6:00 AM 12/6 | 30.78 | 0.832 |
| 5:45 AM 12/6 | 30.78 | 0.832 |
| 5:30 AM 12/6 | 30.78 | 0.832 |
| 5:15 AM 12/6 | 30.78 | 0.832 |
| 5:00 AM 12/6 | 30.78 | 0.832 |
| 4:45 AM 12/6 | 30.77 | 0.823 |
| 4:30 AM 12/6 | 30.77 | 0.823 |
| 4:15 AM 12/6 | 30.78 | 0.832 |
| 4:00 AM 12/6 | 30.77 | 0.823 |
| 3:45 AM 12/6 | 30.78 | 0.832 |
| 3:30 AM 12/6 | 30.77 | 0.823 |
| 3:15 AM 12/6 | 30.76 | 0.813 |
| 3:00 AM 12/6 | 30.76 | 0.813 |
| 2:45 AM 12/6 | 30.76 | 0.813 |
| 2:30 AM 12/6 | 30.75 | 0.803 |
| 2:15 AM 12/6 | 30.75 | 0.803 |
| 2:00 AM 12/6 | 30.75 | 0.803 |
| 1:45 AM 12/6 | 30.75 | 0.803 |
| 1:30 AM 12/6 | 30.74 | 0.793 |
| 1:15 AM 12/6 | 30.74 | 0.793 |
| 1:00 AM 12/6 | 30.74 | 0.793 |
| 12:45 AM 12/6 | 30.74 | 0.793 |
| 12:30 AM 12/6 | 30.74 | 0.793 |
| 12:15 AM 12/6 | 30.73 | 0.784 |
| 12:00 AM 12/6 | 30.73 | 0.784 |
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.
