The National Weather Service says the warning is in effect through 8 p.m. Friday for mountain and valley sections of Los Angeles, Ventura, Santa Barbara and San Luis Obispo counties.
Gusts between 40 and 50 mph are predicted for some areas, with the strongest winds coming during morning hours. Temperatures are expected in the high 60s and low 70s.
Southern California has experienced weeks of wind events and low humidity, which has made vegetation dangerously dry and raised wildfire danger.
Crews are very close to fully containing a week-old 3-square-mile conflagration that destroyed five houses in Glendora and Azusa.