Snow in the mountains
Snow in the mountains will make driving difficult. Photo by S. Coleman courtesy National Weather Service

A winter weather advisory, which signifies exceedingly challenging travel conditions, including roads covered by ice and snow, is in effect in the San Gabriel Mountains Thursday because of a storm having only a negligible impact at lower elevations.

The advisory went into effect at 6 p.m. Wednesday and is scheduled to expire at 11 Thursday evening.

The National Weather Service said up to 4 inches of snow would accumulate above 5,500 feet, and up to 2 inches across the Interstate 5 corridor as northwest winds gust at between 30 and 40 miles per hour.

The snow level will come down to around 2,500 feet Thursday morning , generating a dusting of snow across the Antelope Valley foothills.

The weather service warned that hail or ice pellet showers are a possibility in the mountains but at sea level, there was only a 20 percent chance of measurable precipitation.

A combination of partly cloudy skies and showers were forecast in L-A county Thursday, along with highs of 37 on Mount Wilson; 53 in Palmdale and Lancaster; 55 in Saugus; 58 in San Gabriel, Burbank and Woodland Hills; 59 in Avalon and Pasadena; 61 in Long Beach; 62 at LAX; and 63 in Downtown L-A. The communities where showers are forecast are Pasadena, San Gabriel, Burbank, Woodland Hills, Saugus and Palmdale. Snow showers are forecast on Mount Wilson. Then, we’ll have sunny weather at least through Wednesday, except Saturday, when skies will be mostly cloudy.

Sunny skies were forecast in Orange County Thursday except for Mission Viejo and locations in the Santa Ana Mountains, where partly cloudy conditions will prevail. Highs will be 36 on Santiago Peak; 47 on Ortega Highway at 2,600 feet; 54 at Fremont Canyon and Trabuco Canyon; 57 in Laguna Beach and San Clemente; 58 in Yorba Linda and Mission Viejo; 59 in Newport Beach; 60 in Anaheim and Irvine; and 61 in Fullerton.v Similar conditions will prevail until Monday when a warming trend will get underway.

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