Already, winds have cause traffic accidents, freeway congestion and downed utility lines. Above Point Mugu an 83 mph gust was reported Friday morning at Ventura County's Laguna Peak, the National Weather Service said.
On the roads, a tractor-trailer rig was flipped onto its side blocking two lanes of the westbound I-210 freeway below the Cajon Pass, a California Department of Transportation spokeswoman said.
In Fontana, where 50 mph winds were registered, utility lines came down over the westbound I-10 freeway and were reportedly scraping the tops of trucks.
Winds are expected to lose their oomph in Los Angeles and Ventura County by Friday afternoon.