LOS ANGELES (CNS) – A cold low-pressure system out of the Pacific Northwest will bring showers, snow and high winds to the Southland today, with the greatest impacts expected in the San Gabriel Mountains and the Antelope Valley – - regions where travel could prove problematic.
The snow level is expected to start between 5,500 and 6,000 feet today but drop to between 3,500 and 4,500 feet this afternoon and this evening, according to a National Weather Service advisory.
“As a result, Interstate 5 near The Grapevine could be impacted by snow showers during this time, along with gusty winds,” it said.
Between 2 and 5 inches of snow are expected to accumulate above 4,500 feet, with lighter accumulation possible as low as 3,500 feet, according to the advisory.
As the atmosphere destabilizes, there also will be a slight chance this afternoon of thunderstorms, which could increase the snowfall, according to NWS meteorologists, who forecast snow showers along interior mountain slopes and at the foothills in the Antelope Valley, with rain showers in the rest of Los Angeles County.
The rainfall could amount to between a tenth and a third of an inch but up to three-quarters of an inch in the mountains, said NWS meteorologist Kathy Hoxsie.
A winter weather advisory denoting an expectation of travel difficulties as a result of snow and blowing snow will be in effect in the San Gabriel Mountains until 4 a.m. Friday.
NWS meteorologists forecast south-to-southwest winds of between 20 and 30 miles per hour in mountain areas, gusting to 45 mph, then shifting to the northeast by tonight.
The snow and high winds will make travel “hazardous” on Highway 33 in Ventura County and Interstate 5 in Los Angeles County near the Kern County line this afternoon and again this evening, with visibility falling to a half-mile or less, according to the advisory.
In the Antelope Valley, winds of between 20-30 mph were expected, along with 45-mph gusts until early this evening, according to NWS forecasters, and isolated gusts of 55 mph may occur in the Lake Palmdale area. A wind advisory will be in force in the Antelope Valley until 8 p.m. today.
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