LOS ANGELES - Scattered rain fell in the Los Angeles area overnight, and a light dusting of snow coated hillsides next to Interstate 5 over the Grapevine today.
But the freeway remained open, as did nearly all roads in the San Gabriel Mountains, according to the CHP and county road crews.
A large rain cell dropped rain at about sunrise in the South Bay. An automated rain gauge at El Segundo noted .16 inches, the largest overnight accumulation in Los Angeles County. Less than a tenth of an inch fell at several stations in the south part of the county.
Chains were required today near the summit on Big Pines Highway, the county road linking Antelope Valley cities with Mountain High Ski Area and Wrightwood. But that was the only reported restriction in the early morning.
Other than a small rainfall noted at Malibu, no measurable rain was recorded at nearly all of the stations north of the Santa Monica (10) or San Bernardino (10) freeways.
Partly sunny skies and possible spotty thunderstorms were in the forecast for the rest of the day. The low pressure trough was expected to cross L.A. in the afternoon, possibly triggering lightning and narrow patches of rain.
The National Weather Service said "the showery nature" of the storm means some mountain locations could get brief snow, down to the 3,500-foot elevation as late as Monday morning.
Gusty winds were predicted for the afternoon today, particularly in the Santa Clarita Valley and along Interstate 5 north of the city.
Small craft warning were posted for possible 35 mile per hour winds off the coast, with gale warnings up for the waters beyond Santa Catalina Island.
Warmer, drier weather was predicted for later Monday and Tuesday, but a very-cold blast of air was predicted for Thursday and the weekend. The NWS said long-term weather predictions were at odds about whether the Thursday front will bring rain, or dry air.