Gusty westerly winds were forecast to develop today as a result of a tight surface pressure gradient forming ahead of what the National Weather Service called "a fairly dry and cold storm system."
The winds were expected to develop and strengthen over the course of the day, becoming more widespread Tuesday, according to the NWS.
In the meantime, a wind advisory went into effect at 9 a.m. in Los Angeles County in the San Gabriel and Santa Monica mountains and the Antelope Valley, expiring at 9 p.m. Tuesday. In Orange County, the wind advisory will be in force near the coast from 10 a.m. today to 6 p.m. Tuesday.
In Los Angeles County, the winds will blow at sustained speeds of between 25 and 35 miles per hour, gusting to up to 55 mph, with isolated 65-mph gusts possible in foothill areas, such as in Lake Palmdale and at Poppy Park in the Antelope Valley, forecasters said. In Orange County, they expect 15-25 mph winds gusting to 45 mph.
NWS meteorologists warned that the wind could churn up blowing sand and dust, reducing visibility and disrupting traffic, especially on the Antelope Valley (14) Freeway and Pearblossom (SR 138) Highway.
The NWS today forecast partly cloudy skies and highs of 58 degrees Fahrenheit on Mount Wilson; 66 in Avalon and Newport Beach; 67 at LAX, 69 in Long Beach; 70 in Burbank and downtown L.A.; 71 in Anaheim, Pasadena and San Gabriel; 72 in Saugus; 73 in Woodland Hills; and 75 in Palmdale and Lancaster.
Tuesday's highs are expected to be 13 degrees lower in the Antelope Valley but only about one degree lower in most communities, although unlike today, many will experience mostly cloudy skies.
—City News Service