A cold low-pressure system was developing over the Pacific Northwest Tuesday and expected to quickly move southward through Central California Wednesday, then through Southern California late Wednesday through early Thursday, NWS forecasters said.
"A storm system moving south over the West Coast will bring a significant change in weather to southwest California Tuesday night through late Wednesday night," according to an NWS advisory.
The storm "will bring much cooler temperatures to the area, with daytime highs falling ... into the lower to mid 60s on Wednesday," it said, adding: "This storm also has the potential to bring measurable rainfall to the area, especially over Los Angeles County and southward."
The unseasonably cold air accompanying the storm—temperatures will be 15-25 degrees below normal—will cause the snow level to drop to between 5,500 and 6,000 feet, and light snow is possible at higher elevations Wednesday night, NWS forecasters said.
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