Willow Creek, California – Drivers and residents in interior northwest California should prepare for a wetter stretch late this weekend as a developing system brings a high chance of rain to the Trinity County mountains, with impacts possible along US-299 by Sunday afternoon and evening.
According to the National Weather Service in Eureka, the probability of measurable rainfall at Willow Creek rises sharply Sunday, with an 84 percent chance of exceeding one-tenth of an inch during a 12-hour window between late afternoon and early Monday morning. The highest likelihood for steady rain appears from around Sunday afternoon through Sunday night, when road conditions could deteriorate quickly.
Forecasters also note a 48 percent chance of rainfall exceeding 0.25 inches by Sunday evening, increasing to 61 percent by Sunday night. While rainfall totals are not extreme, persistent showers could lead to slick pavement and reduced visibility along mountain routes, particularly on US-299 through Willow Creek, Burnt Ranch, and toward the Humboldt County line.
The timing of the rain is important for travelers, as the most consistent rainfall may coincide with late-day and nighttime travel. Even light to moderate rain can create hazardous conditions on curving canyon roads, where wet leaves, debris, and limited lighting add to the risk.
Soils remain seasonally moist, and while flooding is not expected, brief ponding of water is possible in low-lying areas and near poor drainage spots. Creeks and small streams could rise modestly during periods of steadier rainfall Sunday night.
Residents are encouraged to monitor updated statements as the event approaches, as fine-scale timing and rainfall amounts may still shift. Motorists should slow down on wet roads, allow extra stopping distance, and be alert for sudden changes in visibility.
Rain chances taper after Sunday night as the system moves through, but additional weather systems may follow later next week. The National Weather Service advises staying tuned for updates, especially if rainfall trends increase or impacts become more widespread along interior roadways.
