The first winter storm of the season brought rain to Stockton on Tuesday, soaking the city as a cold front moves through California.
More rain showers are expected from Tuesday evening through Wednesday, along with unusually cold temperatures and gusty winds. Some areas of Stockton were briefly without power on Tuesday, according to Pacific Gas and Electric Co.
Northern California was also hit by lightning and thunderstorms, tweeted the National Weather Service.
With the calendar still pointing to fall, winter storm warnings went into effect across much of the Sierra Nevada and forecasters advised against mountain travel due to expected deteriorating conditions.
“Travel could be very difficult, if not impossible,” the National Weather Service said.
The California Highway Patrol office in Truckee, in the Sierra north of Lake Tahoe, said drivers should expect chain checks and delays due to the first major snowfall of the season.
Ebbetts, Sonora and Monitor passes have been closed in anticipation of the storm, the California Department of Transportation said. Tioga Road through Yosemite National Park was also closed.
The Weather Service said the heaviest rainfall is expected in Northern California, where sleet and gusty winds could impact travel on parts of Interstate 5.
“While needed, this rainfall will do little in the extreme to exceptional drought that continues to plague much of California,” the forecasters wrote.
The Associated Press contributed to this report.