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Cowlitz River at Castle Rock

Critical Stages
46' - Action
48' - Flood
54' - Moderate
57' - Major

Latest Observation

Updated: 11:30 AM PST 12/15/25

Status: No Flooding

Stage: 42.42 ft

Flow: 36.3 kcfs

Forecast

TimeStage (ft)Flow (kcfs)
4 PM 12/15 42.46 36.4
10 PM 12/15 42.75 37.5
4 AM 12/16 42.91 38.1
10 AM 12/16 43.01 38.4
4 PM 12/16 43.1 38.7
10 PM 12/16 43.32 39.5
4 AM 12/17 43.93 41.7
10 AM 12/17 44.43 43.5
4 PM 12/17 44.69 44.4
10 PM 12/17 44.71 44.5
4 AM 12/18 44.55 43.9
10 AM 12/18 44.38 43.3
4 PM 12/18 44.33 43.1
10 PM 12/18 44.47 43.6
4 AM 12/19 44.7 44.4
10 AM 12/19 44.87 45
4 PM 12/19 44.94 45.3
10 PM 12/19 44.87 45
4 AM 12/20 44.69 44.4
10 AM 12/20 44.47 43.6
4 PM 12/20 44.24 42.8
10 PM 12/20 44.03 42.1
4 AM 12/21 43.84 41.4
10 AM 12/21 43.68 40.8
4 PM 12/21 43.56 40.4
10 PM 12/21 43.45 40
4 AM 12/22 43.36 39.7
10 AM 12/22 43.27 39.3
4 PM 12/22 43.19 39.1
10 PM 12/22 43.12 38.8
4 AM 12/23 43.06 38.6
10 AM 12/23 43.02 38.5
4 PM 12/23 43 38.4
10 PM 12/23 42.98 38.3
4 AM 12/24 42.94 38.2
10 AM 12/24 42.88 38
4 PM 12/24 42.82 37.7
10 PM 12/24 42.77 37.6
4 AM 12/25 42.75 37.5
TimeStage (ft)Flow (kcfs)
11:30 AM 12/15 42.42 36.3
11:15 AM 12/15 42.4 36.2
11:00 AM 12/15 42.39 36.2
10:45 AM 12/15 42.32 35.9
10:30 AM 12/15 42.33 36
10:15 AM 12/15 42.28 35.8
10:00 AM 12/15 42.25 35.7
9:45 AM 12/15 42.24 35.7
8:30 AM 12/15 42.15 35.3
8:15 AM 12/15 42.17 35.4
8:00 AM 12/15 42.11 35.2
7:45 AM 12/15 42.08 35.1
7:30 AM 12/15 42.09 35.1
7:15 AM 12/15 42.13 35.3
7:00 AM 12/15 42.06 35
6:45 AM 12/15 42.06 35
6:30 AM 12/15 42.08 35.1
6:15 AM 12/15 42 34.8
6:00 AM 12/15 42.05 35
5:45 AM 12/15 42.02 34.9
4:30 AM 12/15 42.03 34.9
4:15 AM 12/15 42.03 34.9
4:00 AM 12/15 42.06 35
3:45 AM 12/15 42.06 35
3:30 AM 12/15 42.05 35
3:15 AM 12/15 42.06 35
3:00 AM 12/15 42.03 34.9
2:45 AM 12/15 42.05 35
2:30 AM 12/15 42 34.8
2:15 AM 12/15 42.03 34.9
Hydrograph for Cowlitz River at Castle Rock
57' - expect widespread and major flooding of homes and property just upstream and downstream of Castle Rock. Impacts include major flooding of the fairgrounds area west of Castle Rock, numerous road closures, and possible overtopping or weakening of portions of the levee protecting Castle Rock, especially sections downstream of the highway bridge.
54' - expect widespread flooding of residential and business areas, especially west of the river in the Four Corners area and along Hwy 411. Also expect widespread flooding of agricultural land. Levees have historically been threatened of overtopping at this and higher levels.
51' - flooding of buildings and residential areas begins, especially west of the river along Hwy 411 and around Four Corners. Also expect widespread flooding of low-lying agricultural land.
48' - expect flooding of several roads and low-lying agricultural lands in areas not protected by levees.
DateStage (ft)
Feb 8, 1996 55.76
Nov 30, 1995 55.16
Jan 8, 2009 54.7
May 18, 1980 52.95
Dec 9, 2015 52.45
Jan 9, 1990 50.6
Nov 24, 1986 50.04
Nov 7, 2006 49.78
Nov 25, 1990 49.46
Jan 7, 2022 49.01
Dec 9, 2025 48.18
Dec 4, 1975 48.18
Feb 24, 1986 48.13
Dec 2, 1977 48.13
Dec 23, 1964 48.06
Nov 18, 1983 47.95
Feb 1, 2003 47.58
Jan 20, 1972 47.45
Dec 29, 1996 46.88
Dec 4, 1982 46.85

Data provided by the National Weather Service.