LOS ANGELES (CNS) - There is a 70 percent chance of scattered showers Sunday, heavy at times, and a slight chance of thunderstorms, according to the National Weather Service.
Snow levels could fall as low as 3,500 feet with a possibility of some light snow over the Grapevine stretch of the Golden State (5) Freeway, the NWS said.
The forecast also calls for cooler temperatures and gusty winds in some areas.
"The cooling trend will spread throughout the interior ... as onshore flow strengthens ahead of another late season cold upper low dropping south along the West Coast," forecasters said. "Low clouds and fog will spread into the valleys ... with highs dropping into the 60s to lower 70s."
Early predictions suggested most of Los Angeles County would receive about a half-inch of rain, with as much as an inch falling in the mountains, although some models showed the region receiving twice those amounts.
A NWS Winter Weather Advisory will be in effect through 5 p.m. Sunday for both the western and eastern San Gabriel Mountains and the Highway 14 Corridor including Acton, Mount Wilson, Mount Baldy, Wrightwood and Angeles Crest Highway.
In addition, a High Surf Advisory will be in effect until 9 p.m. Sunday for the Malibu coast and Los Angeles County beaches, with waves of 4 to 8 feet and dangerous rip currents.
The weekend storm system will be followed by several days of warmer and drier weather.
"A drying and warming trend will begin Monday and last through next week," the NWS reported. The agency said the "80s are possible as soon as next Wednesday in the warmer valleys."