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Mad River near Arcata

Critical Stages
15' - Action
22' - Flood
24' - Moderate
28' - Major

Latest Observation

Updated: 5:45 AM PST 12/10/25

Status: No Flooding

Stage: 5.89 ft

Flow: 0.125 kcfs

Forecast

TimeStage (ft)Flow (kcfs)
7 AM 12/10 5.86 0.119
8 AM 12/10 5.86 0.119
9 AM 12/10 5.86 0.119
10 AM 12/10 5.86 0.119
11 AM 12/10 5.86 0.119
12 PM 12/10 5.86 0.119
1 PM 12/10 5.86 0.119
2 PM 12/10 5.86 0.119
3 PM 12/10 5.85 0.116
4 PM 12/10 5.85 0.116
5 PM 12/10 5.85 0.116
6 PM 12/10 5.85 0.116
7 PM 12/10 5.85 0.116
8 PM 12/10 5.85 0.116
9 PM 12/10 5.85 0.116
10 PM 12/10 5.85 0.116
11 PM 12/10 5.85 0.116
12 AM 12/11 5.84 0.114
1 AM 12/11 5.84 0.114
2 AM 12/11 5.84 0.114
3 AM 12/11 5.84 0.114
4 AM 12/11 5.84 0.114
5 AM 12/11 5.84 0.114
6 AM 12/11 5.84 0.114
7 AM 12/11 5.84 0.114
8 AM 12/11 5.84 0.114
9 AM 12/11 5.84 0.114
10 AM 12/11 5.84 0.114
11 AM 12/11 5.83 0.112
12 PM 12/11 5.83 0.112
1 PM 12/11 5.83 0.112
2 PM 12/11 5.83 0.112
3 PM 12/11 5.83 0.112
4 PM 12/11 5.83 0.112
5 PM 12/11 5.83 0.112
6 PM 12/11 5.83 0.112
7 PM 12/11 5.83 0.112
8 PM 12/11 5.83 0.112
9 PM 12/11 5.83 0.112
10 PM 12/11 5.83 0.112
11 PM 12/11 5.82 0.11
12 AM 12/12 5.82 0.11
1 AM 12/12 5.82 0.11
2 AM 12/12 5.82 0.11
3 AM 12/12 5.82 0.11
4 AM 12/12 5.82 0.11
5 AM 12/12 5.82 0.11
6 AM 12/12 5.82 0.11
7 AM 12/12 5.82 0.11
8 AM 12/12 5.82 0.11
9 AM 12/12 5.81 0.108
10 AM 12/12 5.81 0.108
11 AM 12/12 5.81 0.108
12 PM 12/12 5.81 0.108
1 PM 12/12 5.81 0.108
2 PM 12/12 5.81 0.108
3 PM 12/12 5.81 0.108
4 PM 12/12 5.81 0.108
5 PM 12/12 5.81 0.108
6 PM 12/12 5.81 0.108
7 PM 12/12 5.8 0.106
8 PM 12/12 5.8 0.106
9 PM 12/12 5.8 0.106
10 PM 12/12 5.8 0.106
11 PM 12/12 5.8 0.106
12 AM 12/13 5.8 0.106
1 AM 12/13 5.8 0.106
2 AM 12/13 5.8 0.106
3 AM 12/13 5.8 0.106
4 AM 12/13 5.8 0.106
5 AM 12/13 5.8 0.106
6 AM 12/13 5.79 0.104
7 AM 12/13 5.79 0.104
8 AM 12/13 5.79 0.104
9 AM 12/13 5.79 0.104
10 AM 12/13 5.79 0.104
11 AM 12/13 5.79 0.104
12 PM 12/13 5.79 0.104
1 PM 12/13 5.79 0.104
2 PM 12/13 5.79 0.104
3 PM 12/13 5.79 0.104
4 PM 12/13 5.79 0.104
5 PM 12/13 5.79 0.104
6 PM 12/13 5.78 0.102
7 PM 12/13 5.78 0.102
8 PM 12/13 5.78 0.102
9 PM 12/13 5.78 0.102
10 PM 12/13 5.78 0.102
11 PM 12/13 5.78 0.102
12 AM 12/14 5.78 0.102
1 AM 12/14 5.78 0.102
2 AM 12/14 5.78 0.102
3 AM 12/14 5.78 0.102
4 AM 12/14 5.78 0.102
TimeStage (ft)Flow (kcfs)
5:45 AM 12/10 5.89 0.125
5:30 AM 12/10 5.88 0.123
5:15 AM 12/10 5.88 0.123
5:00 AM 12/10 5.88 0.123
4:45 AM 12/10 5.88 0.123
4:30 AM 12/10 5.88 0.123
4:15 AM 12/10 5.88 0.123
4:00 AM 12/10 5.88 0.123
3:45 AM 12/10 5.88 0.123
3:30 AM 12/10 5.87 0.121
3:15 AM 12/10 5.87 0.121
3:00 AM 12/10 5.87 0.121
2:45 AM 12/10 5.86 0.119
2:30 AM 12/10 5.87 0.121
2:15 AM 12/10 5.86 0.119
2:00 AM 12/10 5.87 0.121
1:45 AM 12/10 5.87 0.121
1:30 AM 12/10 5.87 0.121
1:15 AM 12/10 5.88 0.123
1:00 AM 12/10 5.88 0.123
12:45 AM 12/10 5.88 0.123
12:30 AM 12/10 5.89 0.125
12:15 AM 12/10 5.89 0.125
12:00 AM 12/10 5.89 0.125
11:45 PM 12/9 5.9 0.127
11:30 PM 12/9 5.89 0.125
11:15 PM 12/9 5.89 0.125
11:00 PM 12/9 5.9 0.127
10:45 PM 12/9 5.9 0.127
10:30 PM 12/9 5.91 0.129
Hydrograph for Mad River near Arcata
33' - Disastrous flooding of all areas near the river from Blue Lake to the mouth. The river is forecast to exceed record levels. All roads in the vicinity of the river are likely to be innundated and travel will be severly restricted. Residents should be prepared to take appropriate action to protect lives and property. This would include homes in Blue Lake, Tyee City and the Arcata Bottoms, as well as US Highway 101 between Arcata and Mckinleyville.
32' - Disastrous flooding of all areas near the river from Blue Lake to the mouth. The river is forecast to approach record levels. All roads in the vicinity of the river are likely to be innundated and travel will be severly restricted. Residents should be prepared to take appropriate action to protect lives and property. This would include homes in Blue Lake, Tyee City and the Arcata Bottoms, as well as US Highway 101 between Arcata and Mckinleyville.
30' - Extensive, severe flooding of all low lying areas near the river from Blue Lake downstream to the mouth. Residents in these areas should be prepared to take appropriate action to protect lives and property. Critical locations include residential areas of Blue Lake, Tyee City, and the Arcata Bottoms, as well as US Highway 101 near Janes Road and areas near Giuntoli Lane.
28' - Severe flooding of all low lying areas near the river from Blue Lake downstream to the mouth. Residents in these areas should be prepared to take appropriate action to protect lives and property. This includes residential areas of Tyee City and the Arcata Bottoms, US Highway 101 near Janes Road, areas near Giuntoli Lane, and Mad River Beach Road.
26' - Severe flooding along Mad River Beach Road and extensive flooding of farmlands and other roads in the area. Flooding of residential areas around Tyee City is likely. Any low lying areas near the river could be flooded. Residents in these areas should be prepared to take appropriate action to protect lives and property.
24' - Extensive flooding along Mad River Beach Road and adjacent farmlands. Some homes along the river could be threatened. Flooding of roads to Tyee City. High tides and strong onshore winds will enhance flood impacts.
23' - Significant flooding of portions of Mad River Beach Road and adjacent farmlands is likely. May cause water to flow across roads to Tyee City. High tides and strong, onshore winds will aggravate flood impacts.
22' - Significant flooding of portions of Mad River Beach Road. Water may flow across roads to Tyee City. Flood impacts will be aggravated by high tides and strong, onshore winds.
21' - Flooding of Mad River Beach Road. Water may be flowing over roads to Tyee City. Flooding will be enhanced if the time of the crest is coincident with high tides and strong onshore winds.
18' - Minor flooding of Mad River Beach Road near Tyee City.
15' - Minor flooding begins on the Mad River Beach Road near Tyee City.
DateStage (ft)
Dec 22, 1964 32.7
Dec 22, 1955 28.43
Jan 13, 2024 27.26
Jan 1, 1997 25.46
Mar 2, 1972 25.4
Feb 8, 1960 24.9
Nov 13, 1957 24.6
Dec 30, 1995 24.17
Jan 17, 1953 24
Feb 27, 2019 23.92
Dec 31, 2005 23.33
Feb 18, 1986 23.1
Jan 20, 1964 23
Jan 18, 2016 22.73
Mar 18, 1975 22.7
Dec 2, 2012 22.67
Jan 12, 1959 22.6
Dec 30, 2022 22.27
Jan 16, 1974 22.2
Jan 29, 1958 22.2

Data provided by the National Weather Service.