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Yakima River at Umtanum

Critical Stages
33.5' - Action
35.5' - Flood
38' - Moderate
39' - Major

Latest Observation

Updated: 11:15 PM PST 12/17/25

Status: Action

Stage: 34.3 ft

Flow: 8.33 kcfs

Forecast

TimeStage (ft)Flow (kcfs)
4 AM 12/18 34.09 7.65
10 AM 12/18 33.82 6.82
4 PM 12/18 33.54 6.01
10 PM 12/18 33.39 5.6
4 AM 12/19 33.42 5.68
10 AM 12/19 33.53 5.98
4 PM 12/19 33.62 6.23
10 PM 12/19 33.64 6.29
4 AM 12/20 33.58 6.12
10 AM 12/20 33.45 5.76
4 PM 12/20 33.29 5.33
10 PM 12/20 33.12 4.89
4 AM 12/21 32.97 4.53
10 AM 12/21 32.83 4.2
4 PM 12/21 32.7 3.9
10 PM 12/21 32.59 3.66
4 AM 12/22 32.51 3.49
10 AM 12/22 32.45 3.37
4 PM 12/22 32.4 3.26
10 PM 12/22 32.36 3.18
4 AM 12/23 32.33 3.12
10 AM 12/23 32.3 3.06
4 PM 12/23 32.27 3.01
10 PM 12/23 32.24 2.95
4 AM 12/24 32.2 2.87
10 AM 12/24 32.16 2.8
4 PM 12/24 32.12 2.72
10 PM 12/24 32.07 2.63
4 AM 12/25 32.03 2.56
10 AM 12/25 31.99 2.49
4 PM 12/25 31.95 2.42
10 PM 12/25 31.92 2.37
4 AM 12/26 31.89 2.32
10 AM 12/26 31.86 2.27
4 PM 12/26 31.84 2.23
10 PM 12/26 31.82 2.2
4 AM 12/27 31.8 2.17
TimeStage (ft)Flow (kcfs)
11:15 PM 12/17 34.3 8.33
11:00 PM 12/17 34.3 8.33
10:45 PM 12/17 34.31 8.36
10:30 PM 12/17 34.3 8.33
10:15 PM 12/17 34.31 8.36
10:00 PM 12/17 34.3 8.33
9:45 PM 12/17 34.31 8.36
9:30 PM 12/17 34.3 8.33
9:15 PM 12/17 34.3 8.33
9:00 PM 12/17 34.3 8.33
8:45 PM 12/17 34.29 8.3
8:30 PM 12/17 34.29 8.3
8:15 PM 12/17 34.3 8.33
8:00 PM 12/17 34.28 8.26
7:45 PM 12/17 34.29 8.3
7:30 PM 12/17 34.28 8.26
7:15 PM 12/17 34.28 8.26
7:00 PM 12/17 34.29 8.3
6:45 PM 12/17 34.28 8.26
6:30 PM 12/17 34.27 8.23
6:15 PM 12/17 34.27 8.23
6:00 PM 12/17 34.26 8.2
5:45 PM 12/17 34.25 8.17
5:30 PM 12/17 34.24 8.13
5:15 PM 12/17 34.23 8.1
5:00 PM 12/17 34.22 8.07
4:45 PM 12/17 34.21 8.04
4:30 PM 12/17 34.19 7.97
4:15 PM 12/17 34.19 7.97
4:00 PM 12/17 34.16 7.87
Hydrograph for Yakima River at Umtanum
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.
DateStage (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.