LOS ANGELES - A winter storm brought steady rain to the Southland overnight Tuesday, making for a wet morning commute Wednesday, dropping snow in the mountains and causing a mudslide in Orange County that prompted evacuation orders.
The National Weather Service warned that the storm, which is expected to continue into at least Thursday and possibly into Friday, could cause minor flooding in southern Los Angeles County, with some minor mud and debris flows possible across the southern portion of the Bobcat and Ranch2 burn areas in the Angeles National Forest. Officials also warned of possible power outages.
At about 7 a.m., a mudslide cascaded onto Silverado Canyon Road in Orange County, but there were no immediate reports of injuries or heavy damage. Due to the fear of more rain prompting additional slides, a mandatory evacuation order was issued for Silverado Canyon, along with evacuation warnings in Modjeska and Williams canyons.
Late Wednesday morning, the warnings were changed to evacuation orders for Modjeska and Williams canyons as well.
The storm system dropped nearly three-quarters of inch of rain in Culver City and more than a half-inch in downtown Los Angeles, Hawthorne and Los Angeles International Airport, according to the NWS. Most valley areas received between a third- and half-inch of rain overnight, while snow fell in some mountain areas, including 5 inches on Mount Wilson.
Skies cleared in many areas by mid-morning, but forecasters warned that the storm wasn't yet finished.
"Most areas should see additional rain today, but it certainly will not rain all day, with plenty of breaks in rain and even the clouds," according to the NWS.
A slight chance of thunderstorms will continue through the day, and snow was falling at levels down to 2,500 feet.
A winter storm warning is in effect until 10 p.m. Thursday for the Los Angeles County mountains, excluding the Santa Monica range, with the National Weather Service anticipating snow accumulations of 6 to 12 inches above 4,500 feet, down to a dusting for elevations around 3,000 feet. The snowy conditions will be joined by southwest winds of 20 to 35 mph, with gusts up to 50 mph.
Forecasters warned that conditions will make driving hazardous in the county's northern reaches, with the 5 and Antelope Valley 14 freeways likely to be affected.
"A cold storm system will bring rain and low elevation snow to the region ... through Thursday evening, potentially causing significant mountain travel issues including Interstate 5,'' according to the NWS. "There will be a slight chance of thunderstorms, especially Wednesday through Thursday. It will be breezy to windy at times and very cool."
The rain could persist into Friday, the NWS said. Dry weather is expected to return by Friday night and continue through the weekend. Gusty winds were also in the forecast.
The Los Angeles County Office of Emergency Management urged residents to be prepared for possible power outages, and to be careful on the roads.
"Rainfall has finally arrived once again in L.A. County, and residents should practice rain safety tips during morning commutes and be prepared for power outages if they should occur, especially since many individuals are working from home during the COVID-19 pandemic," said Kevin McGowan, director of the County Office of Emergency Management.
"Weather-activated shelters are also available to help keep persons experiencing homelessness out of the rain for several days, until the current storm passes."
Due to the wet forecast, the Los Angeles Homeless Services Authority announced that weather-activated shelters would be open from 5 p.m. Tuesday until 7 a.m. Friday at Loma Alta Park in Altadena; Glassell Park Recreation Center; Mary Bethune, Enterprise and Leon Washington parks in South Los Angeles; and Alondra Park in Torrance.
Information about shelters is available by calling 211 or 800-548-6047.