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| MAD RIVER - ARCATA (ARCC1) | ||||||||||||||||||
| Latitude: 40.91º N | Longitude: 124.06º W | Elevation: 13 Feet | ||||||||||||||||
| Location: Humboldt County in CA | ||||||||||||||||||
| River Group: North Coast | ||||||||||||||||||
| Issuance Time: | Jan 10 2026 at 11:09 AM PST |
| Please Note: | Flow data on this product are unregulated / full natural flow. |
| Historical Flows |
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| Location Photographs | ||
| ESRI™ Locator Map |
| Official 7 Day National Weather Service Forecast (CAZ103) |
| Tonight: Mostly cloudy. Patchy fog overnight. Lows 34 to 44. Southeast wind around 5 mph. Sunday: Mostly cloudy in the morning then becoming partly cloudy. Areas of frost and patchy fog in the morning. Highs 53 to 63. Southeast wind around 5 mph shifting to the northwest in the afternoon. Sunday Night: Partly cloudy in the evening then becoming mostly cloudy. Patchy fog. Lows 34 to 44. Northeast wind around 5 mph. Monday: Mostly sunny. Highs 52 to 62. North wind around 5 mph. Monday Night: Partly cloudy. Patchy dense fog. Lows 36 to 46. Northeast wind around 5 mph. Tuesday: Sunny. Highs 56 to 66. Northeast wind around 5 mph. Tuesday Night: Mostly clear. Patchy fog. Lows 39 to 49. Wednesday: Mostly sunny. Highs 56 to 66. Wednesday Night: Clear. Patchy fog. Lows 41 to 51. Thursday: Sunny. Highs 62 to 72. Thursday Night: Mostly clear. Patchy fog. Lows 41 to 51. Friday and Friday Night: Mostly clear. Highs 60 to 70. Lows 40 to 50. Saturday: Mostly sunny. Highs 59 to 69. |
| Flood Impacts | |
| 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 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. |
| 32.0 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 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. |
| 30.0 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 the Arcata Bottoms, as well as US Highway 101 near Janes Road and areas near Giuntoli Lane. |
| 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 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. |
| 26.0 Feet | 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. |
| 24.0 Feet | 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. |
| 23.0 Feet | 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. |
| 22.0 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. |
| 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. |
| 18.0 Feet | Minor flooding of Mad River Beach Road near Tyee City. |
| 15.0 Feet | Minor flooding begins on the Mad River Beach Road near Tyee City. |