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Cowlitz River below Mayfield Dam

Critical Stages
Action
Flood
Moderate
Major

Latest Observation

Updated: 8:00 PM PST 12/14/25

Status: Minor

Stage: 29 ft

Flow: 19 kcfs

Forecast

TimeStage (ft)Flow (kcfs)
10 PM 12/14 28.99966 19
4 AM 12/15 28.99966 19
10 AM 12/15 28.99966 19
4 PM 12/15 28.99966 19
10 PM 12/15 28.99966 19
4 AM 12/16 28.99966 19
10 AM 12/16 28.99966 19
4 PM 12/16 28.99966 19
10 PM 12/16 28.99966 19
4 AM 12/17 28.99966 19
10 AM 12/17 28.99966 19
4 PM 12/17 28.99966 19
10 PM 12/17 28.99966 19
4 AM 12/18 28.99966 19
10 AM 12/18 28.99966 19
4 PM 12/18 28.99966 19
10 PM 12/18 28.99966 19
4 AM 12/19 28.99966 19
10 AM 12/19 28.99966 19
4 PM 12/19 28.99966 19
10 PM 12/19 28.99966 19
4 AM 12/20 28.99966 19
10 AM 12/20 28.99966 19
4 PM 12/20 28.99966 19
10 PM 12/20 28.99966 19
4 AM 12/21 28.99966 19
10 AM 12/21 28.99966 19
4 PM 12/21 28.99966 19
10 PM 12/21 28.99966 19
4 AM 12/22 28.99966 19
10 AM 12/22 28.99966 19
4 PM 12/22 28.99966 19
10 PM 12/22 28.99966 19
4 AM 12/23 28.99966 19
10 AM 12/23 28.99966 19
4 PM 12/23 28.99966 19
10 PM 12/23 28.99966 19
4 AM 12/24 28.99966 19
TimeStage (ft)Flow (kcfs)
8:00 PM 12/14 29 19
7:45 PM 12/14 29 19
7:30 PM 12/14 29 19
7:15 PM 12/14 29 19
7:00 PM 12/14 29 19
6:45 PM 12/14 29 19
6:30 PM 12/14 29 19
6:15 PM 12/14 29 19
6:00 PM 12/14 29 19
5:45 PM 12/14 29 19
5:30 PM 12/14 29 19
5:15 PM 12/14 29 19
5:00 PM 12/14 29 19
4:45 PM 12/14 29 19
4:30 PM 12/14 29 19
4:15 PM 12/14 29 19
4:00 PM 12/14 29 19
3:45 PM 12/14 29 19
3:30 PM 12/14 29 19
3:15 PM 12/14 29.1 19
3:00 PM 12/14 29 19
2:45 PM 12/14 29.1 19
2:30 PM 12/14 29 19
2:15 PM 12/14 29 19
2:00 PM 12/14 29 19
1:45 PM 12/14 29.1 19
1:30 PM 12/14 29 19
1:15 PM 12/14 29 19
1:00 PM 12/14 29 19
12:45 PM 12/14 29 19
Hydrograph for Cowlitz River below Mayfield Dam
60000' - the Cowlitz River will cause severe near record flooding below Mayfield Dam downstream through Toledo. Deep and swift flood waters will inundate farmlands...roads...and some residential areas...especially near Toledo. Major damage due to erosion is likely. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Cowlitz River Basin.
45000' - the Cowlitz River will cause major flooding from Mayfield Dam downstream through Toledo. Deep and swift flood waters will inundate farmlands...roads...and some residential areas...especially near Toledo. Some damage due to erosion is possible. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Cowlitz River Basin.
35000' - the Cowlitz River will flood the reach from Mayfield Dam downstream through Toledo. Swift flood waters will inundate some farmlands and several roads...especially near Toledo.
25000' - the Cowlitz River will flood the reach from Mayfield Dam downstream through Toledo. Flood waters will inundate some farmlands and several roads...mainly near Toledo.
DateStage (ft)
Nov 28, 1995 26.19
Dec 4, 1975 25.26
Dec 13, 1946 24.75
Jan 30, 1965 24.36
Nov 24, 1959 23.71
Dec 4, 1977 23.69
Feb 11, 1951 22.5
Dec 12, 1955 22.05
Nov 21, 1962 21.83
Nov 24, 1942 21.5
Dec 23, 1950 21.33
Dec 10, 1953 21.09
Jan 7, 2009 20.59
Dec 29, 1945 20.33
Nov 6, 1934 20.1
Dec 13, 1966 20.09
Dec 30, 1937 19.91
Nov 12, 1958 19.69
Dec 22, 1955 19.65
Nov 24, 1990 19.62

Data provided by the National Weather Service.