A Winter Weather Watch is in effect on until Thursday Afternoon for the Mountains of Ventura, Los Angeles and Riverside Counties.
A cold Pacific storm out of the Gulf of Alaska moved into the Southland Wednesday night, where it will generate rain, drop the snow level as low as 3,500 feet and cause temperatures to plummet.
The storm will produce steady rain followed by widespread showers Thursday afternoon.
Rainfall totals resulting from the storm are expected to be between a quarter-inch and a half-inch in coastal and valley areas, between a half-inch and an inch in the foothills and mountains, and a third of an inch or less in the deserts.
The storm will cause the snow level to fall to its lowest point so far this season, according to the advisory. It will start at 6,000 feet Wednesday night and drop to around 3,500 feet by Thursday morning.
Between four and twelve inches of snow are expected above 5,000 feet, and between one and four inches between 4,000 and 5,000 feet.
"A dusting of snow may fall at elevations as low as 3,500 feet, possibly even in the foothills above the Antelope and Cuyama valleys.
Interstate 5 through The Grapevine could become snowy and that snow being blown around by gusty winds could reduce visibility substantially, making driving dangerous and creating perilous conditions for any unprepared hikers.
Temperatures will fall substantially over the coming days, and daytime temperatures Thursday will be 10 to 15 degrees below normal.
Don't put away those umbrellas just yet. A couple of smaller storms are expected to make their way to Southern California. Unsettled Weather will continue until early Monday. So we could see showers or even a few thunderstorms anytime thought the period.
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Updated at 11:55 p.m. Wednesday by the FOX 11 Weather Team