CNRFC - Hydrology - River Guidance - Graphical RVF

MAD RIVER - ARCATA (ARCC1)

Latitude: 40.91º N	Longitude: 124.06º W	Elevation: 13 Feet
Location: Humboldt County in California

Monitor Stage: 15.0 Feet

Flood Stage: 22.0 Feet

Historical Info	Peak Discharge	Stage	Date
Period of Record	81,000 cfs	30.70 feet*	Dec 22, 1964
Dec 1996 - Jan 1997	Not Available	Unofficial 25.50 feet	Jan 01
1995	38,100 cfs	20.76 feet	Jan 09
Feb 1986	49,000 cfs	21.12 feet*	Feb 18

* Different Datum

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

Regional Location Map		Gage Station Location Map

Official 7 Day National Weather Service Forecast (CAZ001)

Rest of Tonight: Partly cloudy. Lows 36 to 46. North wind up to 10 mph.

Tuesday: Mostly sunny. Highs 56 to 66. North wind around 10 mph.

Tuesday Night: Mostly clear. Lows 38 to 48. Northeast wind around 5 mph.

Wednesday: Sunny in the morning then becoming partly cloudy. Highs 55 to 65. North wind around 5 mph.

Wednesday Night: Mostly cloudy. Patchy fog. Lows 40 to 50. Northwest wind around 5 mph.

Thanksgiving Day: Mostly cloudy. Patchy fog. Chance of rain. Highs 52 to 62. Southeast wind 5 to 15 mph.

Thursday Night: Rain likely. Lows 37 to 47.

Friday: Mostly cloudy. Chance of rain. Highs 51 to 61.

Friday Night: Mostly cloudy. Areas of fog. Lows 35 to 45.

Saturday: Mostly cloudy. Patchy fog. Highs 51 to 61.

Saturday Night: Mostly cloudy in the evening then becoming partly cloudy. Lows 35 to 45.

Sunday through Monday: Partly cloudy. Highs 52 to 62. Lows 35 to 45.

Impacts - E19 Information
15.0 Feet	Minor flooding begins on the Mad River Beach Road near Tyee City.
18.0 Feet	Minor flooding on Mad River Beach Road near Tyee City.
21.0 Feet	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.
22.0 Feet	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.
23.0 Feet	Significant 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 Feet	Extensive 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 Feet	Severe 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 Feet	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 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 Feet	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 Arcata Bottoms, as well as US Highway 101 near Janes Road and areas near Giuntoli Lane.
32.0 Feet	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 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 Feet	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 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.

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.