National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

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MAD RIVER - ARCATA (ARCC1)
Latitude: 40.91º NLongitude: 124.06º WElevation: 13 Feet
Location: Humboldt County in CaliforniaBulletin Group: North CoastRiver Group: North Coast
Monitor Stage: 15.0 FeetFlood Stage: 22.0 Feet

Observed Data Credit
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Raw streamflow data is provided by the US Geological Survey (USGS).
View USGS Data for this station location.

Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
2022
10,500
13.20
Jan 5, 2022
2021
13,000
14.28
Feb 15, 2021
2020
12,500
14.10
Jan 26, 2020
2019
38,900
23.92
Feb 27, 2019
2018
15,800
14.78
Apr 7, 2018
 Historical High Stage/Flow Events (Period of Record - Aug 1950 to Present) - Ranked by Flow
1964
81,000
30.70
Dec 22, 1964
1956
80,000
--
Dec 22, 1955
1953
75,000
--
Jan 17, 1953
1996
54,700
24.17
Dec 30, 1995
Location Photographs
ESRI™ Locator Map
Impacts - E19 Information
15.0 FeetMinor flooding begins on the Mad River Beach Road near Tyee City.
18.0 FeetMinor flooding on Mad River Beach Road near Tyee City.
21.0 FeetFlooding 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.
22.0 FeetSignificant 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.
23.0 FeetSignificant flooding of portions of Mad River Beach Road and adjacent farm lands is likely. May cause water to flow across roads to Tyee City. High tides and strong onshore winds will aggravate flood impacts.
24.0 FeetExtensive flooding along Mad River Beach Road and adjacent farm lands. Some homes along the river could be threatened. Flooding of roads to Tyee City. High tides and strong onshore winds worsen impacts.
26.0 FeetSevere flooding along Mad River Beach Road and extensive flooding of farm lands 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.
28.0 FeetSevere flooding of all low-lying areas near the river from Blue Lake downstream to the mouth. Residents in these areas should be prepared 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.
30.0 FeetExtensive, 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 Arcata Bottoms, as well as US Highway 101 near Janes Road and areas near Giuntoli Lane.
32.0 FeetDisastrous 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 inundated and travel will be severely 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.
33.0 FeetDisastrous 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 inundated and travel will be severely 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.
Official 7 Day National Weather Service Forecast   (CAZ103)
Today: Snow showers in the morning. Rain showers and chance of thunderstorms through the day. Some thunderstorms may produce small hail. Snow level 1000 to 1500 feet. Snow accumulations up to 1 inch. Highs 39 to 49. Southwest wind 15 to 25 mph.

Tonight: Chance of thunderstorms in the evening. Rain showers through the night. Slight chance of thunderstorms overnight. Some thunderstorms may produce small hail in the evening. Some thunderstorms may produce small hail overnight. Snow level 1000 to 1500 feet. Lows 31 to 41. South wind up to 10 mph.

Sunday: Rain showers and slight chance of thunderstorms. Some thunderstorms may produce small hail. Highs 41 to 51. South wind around 10 mph shifting to the southwest up to 10 mph in the afternoon.

Sunday Night: Rain showers and slight chance of thunderstorms. Lows 33 to 43. South wind 5 to 15 mph.

Monday: Breezy, rain. Highs 45 to 55. South wind 15 to 25 mph.

Monday Night: Rain likely. Lows 37 to 47.

Tuesday: Mostly cloudy. Rain likely. Highs 46 to 56.

Tuesday Night: Mostly cloudy. Chance of rain showers. Lows 32 to 42.

Wednesday and Wednesday Night: Partly cloudy. Slight chance of rain showers. Highs 46 to 56. Lows 31 to 41.

Thursday through Friday: Partly cloudy. Highs 48 to 62. Lows 31 to 41.
Product Disclaimer

This river graphic is not intended to serve as a substitute for official flood watches, warnings, advisories, or statements issued by the NWS Eureka Weather Forecast Office. Observations are preliminary and subject to change. River levels identified as "forecast" should be consistent with those contained in official NWS products. River levels identified as "guidance" have significant uncertainty due to future weather or reservoir regulation and are provided for planning purposes only.