A storm system that brought snow to parts of California was also bringing some much-needed rain to Southern California on Monday, according to the National Weather Service.
Forecasters predicted a low pressure trough in the northern part of the state will move into the Southland during the afternoon and evening hours.
By 4:30 p.m., rain was already being reported in parts of Southern California, and mud was flowing across the 5 Freeway in the Grapevine, according to CHP.
The flow was not bad enough to force the closure of the freeway, a CHP dispatcher said late in the afternoon.
Last month, the freeway was shut down in the Grapevine area due to a mud flow that left dozens of motorists stranded on the roadway.
Earlier, the weather service had said the storm would bring rain to parts of the drought-stricken region, with higher amounts expected in foothill and mountain areas.
L.A. County had an approximately 40 to 50 percent chance of rain on Monday, the Los Angeles Times reported.
Showers could continue through Wednesday morning, particularly in San Diego County.
The storm brought snow to various parts of the Sierra Nevada mountains, Caltrans District 3 tweeted. It was also snowing during the morning hours at Mammoth Mountain, video from the resort showed.
In Olympic Valley, the storm dumped at least 8 inches of snow at Squaw Valley-Alpine Meadows, according to a news release from the ski resort stated. Showers were expected during the nighttime, and more snow was possible on Tuesday.
The storm — described as the first significant one of the season — could bring as much as a foot of snow to the Sierra Nevada, according to the Times.
The snow is much needed for the Sierra Nevada mountains, which recorded its lowest snowpack in about 500 years earlier this year amid California’s ongoing drought. The melting snow usually provides the state with one-third of its water supply, the newspaper reported.
In addition to snow and rain, strong winds have also been forecast in the mountain and desert areas, the weather service stated.
The gusty winds could potentially bring down power lines and trees, forecasters warned.
After a warm October, Southern California was starting to experience cooler temperatures at the start of the week, with a high of 70 degrees expected in coastal and valley areas on Monday, the Times reported.
Forecasters predicted temperatures would be coldest Tuesday, with temperatures reaching into the 30s and 40s degrees across higher terrain.
“We expect a continuing cooling trend into tomorrow — being our coldest day,” Robbie Munroe, a meteorologist with the National Weather Service, told the Times.
The lower temperatures prompted the L.A. county health officials to issue a cold weather alert for Monday and Tuesday in the Mount Wilson area, where wind child temperatures are expected to drop below 32 degrees.