“A cold low pressure system will develop over the Pacific Northwest Tuesday, then move quickly southward through Central California on Wednesday and through Southern California late Wednesday through early Thursday,” according a National Weather Service advisory.
High temperatures in the region will be 15 to 25 degrees below average for the time of year, meaning they’ll be in the mid-50s to mid-60s in coastal and valley areas, mid-30s to mid-50s in the mountains, the 60s in the upper deserts and in the 70s in the lower deserts, an NWS advisory said.
Rainfall from the system was expected to range from one to two-tenths of an inch of rainfall near the coast to a quarter to three-quarters of an inch in the mountains.
The cold low pressure system was also expected to bring sustained 20 to 30 mile per hour westerly winds to the mountains and deserts, and widespread gusts of up to 50 mph. Isolated gusts up to 65 mph were also possible, the NWS said.
The agency issued a wind advisory for the mountains and deserts from 5 p.m. today to 5 a.m. Wednesday, and a high wind watch from late tonight to late Wednesday night. A wind advisory means winds in excess of 35 mph are expected, while a high wind watch is issued when winds capable of causing property damage are expected or occurring.
“The winds will make driving difficult, especially for motorists with high profile vehicles,” an NWS advisory said. “Watch for broken tree limbs and downed power lines.”
Snowfall was possible in the county’s highest peaks, though it would be a small amount, if any. The NWS said the snow level would drop to 5,500 to 6,000 feet Wednesday night through early Thursday, with a few inches of snowfall possible above 6,000 feet and around a half-foot above 7,000 feet.