EUREKA, Calif. — A series of Pacific storm systems is bringing periods of rain to Northwest California beginning Monday, with totals of 1 to 4 inches possible in parts of the region through Wednesday, according to the National Weather Service.
Forecasters said rain showers will increase Monday as a frontal system moves ashore, followed by additional waves of moisture on Tuesday and Wednesday. The heaviest rainfall is expected in Humboldt and Del Norte counties, where some coastal and higher-elevation locations could receive 2 to 4 inches of rain by midweek.
Rainfall totals of 2 to 3 inches are forecast across much of Humboldt County, including the Eureka area, while northern Mendocino County and Trinity County could see similar amounts. In southern Mendocino and Lake counties, meteorologists cautioned that totals may end up higher than currently forecast, especially from Tuesday night into Wednesday.
Lighter amounts, generally under 1 inch, are expected farther south toward interior Lake County valleys, though steady rainfall over multiple days could still create localized issues.
The National Weather Service warned that impacts from the prolonged rainfall include ponding of water on roadways, reduced visibility during heavier downpours, and an increased risk of rockslides and mudslides, particularly along steep terrain, burn scars and mountain highways.
Drivers are urged to slow down during heavy rain, allow extra stopping distance, and remain alert for debris on roadways. Residents in slide-prone areas are encouraged to monitor conditions closely and be prepared to act if slopes become unstable.
Forecasters said additional rain chances may continue later in the week, keeping soils saturated and prolonging travel and safety concerns. Officials emphasized staying updated on forecasts and alerts as rainfall totals and impacts may change with each passing system.
