The Southland confronted strong Santa Ana winds and freezing temperatures Tuesday, prompting a flurry of National Weather Service warnings and advisories.
A wind advisory will be in effect until 9 a.m. Wednesday in the Santa Monica Mountains Recreational Area, the Santa Ana Mountains of Orange County and the county’s inland areas, and until 3 p.m. Tuesday in the San Fernando Valley. Winds of 25-35-mph with gusts of 50 mph are expected in the Santa Monicas amid early morning temperatures as low as 31 degrees.
Also in force until 9 a.m. Tuesday is a freeze warning in the Santa Monicas, and in the San Fernando Valley until 10 a.m. Tuesday, along with a freeze watch through Wednesday morning. Also in force through 10 a.m. Tuesday is a hard freeze warning in the Antelope Valley and a hard freeze watch through Wednesday morning. Antelope Valley temperatures may fall to 14 degrees Tuesday morning and 18 degrees Wednesday morning, forecasters said.
“The wind, in combination with low temperatures, will result in wind chill readings from 5 to 10 degrees in most areas” of the Antelope Valley, warned the NWS.
Santa Ana winds, meanwhile, are expected in parts of L.A County. A wind advisory will be in effect until 9 a.m. Wednesday in the Santa Monica Mountains Recreational Area and the San Gabriel Mountains, and until 3 p.m. Tuesday in the San Fernando and Santa Clarita valleys.
In the San Fernando Valley, northeast winds of 20 to 30 miles per hour are expected, accompanied by 45-mph gusts, amid early morning temperatures as low as 29 degrees, forecasters said.
In the San Gabriels, the northeast winds will blow at 25 to 35 mph, gusting to between 45 and 55 mph.
The NWS urged residents to take steps “to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they shouldbe wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above-ground pipes to protect them from freezing.”
In the Santa Clarita Valley, the wind, in combination with low temperatures, will result in wind chill readings near 20 degrees, while in the San Gabriels the wind and the temperatures will result in wind chill readings between 0 and 5 degrees.
The NWS also said that “gusty winds will blow around unsecured objects and make driving difficult, especially for high-profile vehicles. Tree limbs could be blown down and a few power outages may result. Frost and freeze conditions will kill crops and other sensitive vegetation. Extended exposure to cold can cause hypothermia for animals and people.”
Also expected are gale-force winds in the Southland’s outer waters, with winds of 20 to 30 knots and waves of 10 to 16 feet, according to the NWS.
The weather service said Tuesday morning that in the previous 24 hours, powerful wind gusts had been recorded in L.A. County, including 77 mph at Henniger Flats in the San Gabriel Mountains; 61 mph at Escondito Canyon along the coast; 60 mph in Altadena in the San Gabriel Valley; 59 mph on Corral Canyon Road in the Santa Monica Mountains Recreational Area; 48 mph at Big Tujunga Canyon Road in the San Fernando Valley; 45 mph in Catalina; and 43 mph at Newhall Pass in the Santa Clarita Valley.
In Orange County, big gusts included 70 mph in the Santa Ana Mountains; and 69 mph at Upper Bell in Inland Orange County.
The NWS also reported the coldest temperatures in the region Tuesday morning, including 14 degrees at Antelope Acres in the Antelope Valley; 31 in Toner Canyon in the San Gabriel Valley; 33 in Redondo Beach at the L.A. County coast; and 37 in Stokes Canyon in the San Fernando Valley.
The NWS forecast sunny skies in L.A. County Tuesday and highs of 40 degrees on Mount Wilson; 50 in Palmdale and Lancaster; 56 in Saugus; 58 in Avalon; 60 in San Gabriel and Burbank; 61 in Pasadena and Woodland Hills; 62 in Long Beach; and 64 in Downtown L.A. and at LAX. Temperatures will be minimally higher Wednesday.
Sunny skies were also forecast in Orange County, along with highs of 36 on Santiago Peak; 49 on Ortega Highway at 2,600 feet; 54 in Fremont Canyon; 56 Trabuco Canyon; 58 in Yorba Linda; 59 in Mission Viejo and Laguna Beach; 60 in Anaheim; and 61 in Fullerton, Newport Beach and San Clemente. Temperatures will be up to 4 degrees higher Wednesday.