An increase of onshore flow and much cooler temperatures will bring an unsettled weekend of weather with drizzle and showers.
A chance of showers, thunderstorms, hail and gusty winds could come out of this cold, "winter-like" system this weekend, said NBC4 forecaster Fritz Coleman.
Temperatures this week ran higher than normal and reached up to the mid-90s on Wednesday. But a deepening marine layer and a strong, onshore flow brought down temperatures 15 to 20 degrees on Friday.
Saturday morning, the marine layer dropped even deeper and some parts of the region saw some drizzle.
"By the afternoon, drizzle turns to spotty showers with most of the rain/snow remaining in the Foothills and Mountains," said NBC4 meteorologist David Biggar. "Saturday night we will see scattered showers across the lower elevations and snow in the Mountains above 4,500 to 5,000 feet."
The storm situated off the central coast will move over the area on Sunday, bringing a lot of instability and the possibility of thunderstorms.
Areas with thunderstorms could get significant amounts of rain from a quarter of an inch to one inch -- hail and gusty winds are possible as well.
Orange, San Bernardino and San Diego counties will get the bulk of the measurable rain, Coleman said.
This is a very cold, out-of-season storm which will drop the snow level to about 5,000 feet with the possibility of two to four inches higher than that. Flurries could actually fall down to 4,000 feet, according to Coleman.
Depending how quickly this storm moves over our area, we may see the last of its effects Monday morning in the form of residual showers.
Temperatures will dip by up to 10 degrees in Los Angeles County Saturday amid showers. Temperatures in L.A County will begin ramping up Monday, reverting to the 70s.
Orange County temperatures will dip by up to 11 degrees Saturday under mostly cloudy skies, then by up to another 4 degrees on Sunday.