* WHAT...Northwest winds 30 to 50 mph with gusts up to 60 mph expected. Strongest during the overnight hours.

* WHERE...Interstate 5 Corridor, Northern Ventura County Mountains, and Southern Ventura County Mountains.

* WHEN...From 9 PM this evening to 9 AM PDT Sunday.

* IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel will be difficult, especially for high profile vehicles.

* ADDITIONAL DETAILS...Wind speeds may drop well below warning levels at times during the daytime hours.

...RED FLAG WARNING IN EFFECT FROM 10 AM TO 10 PM PDT SATURDAY FOR STRONG WEST TO NORTHWEST WINDS AND LOW RELATIVE HUMIDITY FOR THE ANTELOPE VALLEY AND ADJACENT WESTERN FOOTHILLS... .The best overlap of strong winds and critically low humidities in the Antelope Valley and adjacent foothills is expected on Saturday, leading to an increased risk of large and fast moving grass fires. The National Weather Service in Los Angeles/Oxnard has issued a Red Flag Warning for strong west to northwest winds and low relative humidity, which is in effect from 10 AM to 10 PM PDT Saturday.

* WINDS...West to northwest 25 to 35 mph with gusts to 50 mph, except damaging gusts up to 60 mph in the western portions of the Antelope Valley.

* RELATIVE HUMIDITY...10 to 20 percent.

* IMPACTS...Any grass fires that develop will likely spread rapidly with extreme fire behavior, with the potential for long range spotting and large fire growth.

* ADDITIONAL DETAILS...While the best overlap of strong winds and low humidities will likely occur during the Red Flag Warning period, there will be an extended elevated fire threat starting as early as this afternoon and persisting through Sunday due to gusty winds and low to moderate humidities.