Powerful gusts that stoked wildfires in Los Angeles County and whipped through parts of Southern California at 60 mph slowed down briefly Monday, but were forecast to return with greater strength the evening of Tuesday, Oct. 29.
Winds reached 68 mph at Pleasants Peak in the Santa Ana Mountains separating Orange and Riverside counties on Monday, the National Weather Service reported.
However, the weather system that also brought 60 mph gusts Monday morning to the Cajon Pass and northern portions of Los Angeles County had weakened dramatically by the early afternoon. A brief period of onshore winds was forecast to bring sub-freezing temperatures into the Antelope Valley overnight, along with patchy clouds along the coast early Tuesday morning.
Meteorologists expect those conditions to be short-lived, as a new weather pattern forms Tuesday evening. It may deliver the strongest winds southern Californians have experienced so far this year, and is expected to linger through Thursday, NWS reports said.
⚠️ RED FLAG WARNING ⚠️
Extremely critical fire weather conditions will arrive Tuesday night and continue through Thursday afternoon.
This has the potential to be the strongest Santa Ana wind event so far this season.
— NWS San Diego (@NWSSanDiego) October 28, 2019
Dry conditions throughout Southern California combined with fast-moving winds will bring the risk of wildfires to critical levels, the NWS said. The NWS issued a red flag warning for Orange, Los Angeles, San Bernardino and Riverside counties effective from 11 p.m. Tuesday through Thursday afternoon.
Relative humidity could dip as low as 6 percent in Anaheim and Riverside, and drop to 5 percent in Burbank, Simi Valley, Lake Elsinore and Santa Clarita. Gusts should accelerate overnight Tuesday, peaking on Wednesday at speeds ranging between 50-70 mph on Wednesday in parts of Los Angeles and Ventura counties.
Meanwhile, temperatures should increase in Southern California from Tuesday through Wednesday and Thursday.
Highs should increase in Long Beach from 70 degrees on Tuesday to 74 degrees Wednesday and 75 degrees on Thursday. That day, temperatures should rise to 75 degrees in Van Nuys, Encino and Malibu; 76 degrees in Torrance; 77 degrees in Hawthorne; 78 degrees in Whittier and Corona and 79 degrees in Murrieta and Fullerton.