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Wynoochee River near Montesano

Critical Stages
39' - Action
42.5' - Flood
43.5' - Moderate
44.5' - Major

Latest Observation

Updated: 2:45 PM PST 12/15/25

Status: No Flooding

Stage: 35.11 ft

Flow: 7.44 kcfs

Forecast

TimeStage (ft)Flow (kcfs)
4 PM 12/15 35.63 8.14
10 PM 12/15 35.18 7.53
4 AM 12/16 36.02 8.68
10 AM 12/16 35.26 7.64
4 PM 12/16 34.9 7.17
10 PM 12/16 35.39 7.81
4 AM 12/17 36.03 8.69
10 AM 12/17 36.02 8.68
4 PM 12/17 35.53 8
10 PM 12/17 34.96 7.24
4 AM 12/18 34.49 6.64
10 AM 12/18 34.25 6.34
4 PM 12/18 34.01 6.04
10 PM 12/18 33.65 5.61
4 AM 12/19 33.56 5.5
10 AM 12/19 33.37 5.28
4 PM 12/19 33.15 5.03
10 PM 12/19 32.95 4.8
4 AM 12/20 32.77 4.6
10 AM 12/20 32.61 4.43
4 PM 12/20 32.48 4.29
10 PM 12/20 32.36 4.16
4 AM 12/21 32.26 4.05
10 AM 12/21 32.16 3.95
4 PM 12/21 32.06 3.84
10 PM 12/21 31.99 3.77
4 AM 12/22 31.94 3.72
10 AM 12/22 31.89 3.67
4 PM 12/22 31.86 3.64
10 PM 12/22 31.82 3.6
4 AM 12/23 31.81 3.59
10 AM 12/23 31.83 3.61
4 PM 12/23 31.86 3.64
10 PM 12/23 31.88 3.66
4 AM 12/24 31.88 3.66
10 AM 12/24 31.87 3.65
4 PM 12/24 31.85 3.63
10 PM 12/24 31.81 3.59
4 AM 12/25 31.77 3.55
TimeStage (ft)Flow (kcfs)
2:45 PM 12/15 35.11 7.44
2:30 PM 12/15 35.07 7.39
2:15 PM 12/15 34.98 7.27
2:00 PM 12/15 34.99 7.28
1:45 PM 12/15 34.92 7.19
1:30 PM 12/15 34.76 6.98
1:15 PM 12/15 34.7 6.91
1:00 PM 12/15 34.57 6.74
12:45 PM 12/15 34.51 6.66
12:30 PM 12/15 34.38 6.5
12:15 PM 12/15 34.34 6.45
12:00 PM 12/15 34.25 6.34
11:45 AM 12/15 34.18 6.25
11:30 AM 12/15 34.09 6.14
11:15 AM 12/15 33.99 6.02
11:00 AM 12/15 33.88 5.88
10:45 AM 12/15 33.83 5.83
10:30 AM 12/15 33.71 5.68
10:15 AM 12/15 33.64 5.6
10:00 AM 12/15 33.56 5.5
9:45 AM 12/15 33.48 5.41
9:30 AM 12/15 33.37 5.28
9:15 AM 12/15 33.34 5.25
9:00 AM 12/15 33.3 5.2
8:45 AM 12/15 33.23 5.12
8:30 AM 12/15 33.15 5.03
8:15 AM 12/15 33.1 4.97
8:00 AM 12/15 33.02 4.88
7:45 AM 12/15 32.98 4.83
7:30 AM 12/15 32.93 4.78
Hydrograph for Wynoochee River near Montesano
44.5' - the Wynoochee River will cause major flooding in the Wynoochee Valley...with deep and swift flood waters inundating farms...residences...and roads. Damage from erosion could be significant. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Wynoochee River Basin.
43.5' - the Wynoochee River will flood much of the low area of the Wynoochee Valley with moderate flooding. Deep and swift flood waters will inundate farms...residential areas...and roads.
42.5' - the Wynoochee River will flood much of the low area of the Wynoochee Valley...with deep and swift flood waters inundating farms...residential areas...and roads.
39.5' - the Wynoochee River will locally spill over its banks into fields in the Wynoochee Valley. Flooding threatens residences and roads upper part of river.
DateStage (ft)
Dec 10, 1956 45.02
Dec 10, 1956 20.54
Mar 19, 1997 20.21
Jan 19, 1968 20.19
Jan 16, 1961 20.12
Jan 7, 2009 20.11
Nov 20, 1962 20.06
Dec 15, 1999 19.93
Nov 20, 1959 19.57
Feb 21, 1961 19.26
Dec 13, 1966 19.2
Nov 6, 2006 18.65
Nov 23, 1959 18.6
Nov 24, 1990 18.16
Apr 30, 1959 18.13
Dec 10, 1993 17.75
Nov 23, 1986 16.86
Nov 20, 2009 16.68
Dec 19, 1994 16.46
Jan 5, 2015 16.18

Data provided by the National Weather Service.