High surf again pounded the coast Friday ahead of a storm expected to bring the Southland light rain Saturday night but heavier precipitation Sunday, possibly accompanied by furious winds, some roadway flooding, and some mud and debris flows down slopes stripped bare by wildfires.

Surf of between 8 and 12 feet is expected in Los Angeles County Friday, and a high surf warning will be in effect until 3 a.m. Saturday. In Orange County, the advisory is scheduled to expire at 10 p.m. Saturday.

But then, an even bigger swell could approach the coast Sunday night into Monday, forecasters said.

Rainfall totals resulting from the approaching Pacific storm are expected to range between a half-inch and an inch in much of the area, with one to two inches in the mountains and foothills, according to the National Weather Service.

While there remains uncertainty about many aspects of the approaching system, “there is the potential for brief heavy rain with the cold front on Sunday, capable of producing local roadway flooding as well as minor mud and debris flows in recent burn areas,” an NWS statement said.

The storm will also produce snowfall, mostly at higher elevations — between one and two feet above 6,000 feet. But the snow level could drop to 3,500 feet Sunday night, when snow showers and strong winds may hit Interstate 5 near The Grapevine, it said. Also expected are strong winds Sunday afternoon into Monday.

‘There is the potential for damaging winds during this period, especially in the mountains and deserts, where wind gusts over 60 miles per hour will be possible,” the statement said. “Downed trees and power lines will be a significant concern with this system.”

The NWS forecast partly cloudy skies Friday and above-normal temperatures, with highs of 64 in Newport Beach, San Clemente and Laguna Beach; 69 on Mount Wilson; 70 at LAX and in Fullerton, Irvine and Anaheim; 71 in Avalon; 72 in Palmdale, Lancaster and Mission Viejo; 74 in Long Beach and Yorba Linda; 75 in downtown L.A.; 76 in San Gabriel, Saugus and Burbank; 77 in Pasadena; and 78 in Woodland Hills.

Friday’s highs in the Antelope Valley will be around 10 degrees higher than they’ve been. But even wilder fluctuations are expected when a significant cooling trend gets underway amid Sunday’s rains. Sunday’s high in downtown L.A., for instance, is forecast to be 62 degrees — 13 degrees lower than today.

After Sunday, there is no rain in the near-term forecast.

—City News Service

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