* WHAT...For the Wind Advisory, north winds 20 to 30 mph with gusts up to 50 mph. For the High Wind Watch, north winds 30 to 40 mph with gusts up to 65 mph possible. * WHERE...San Bernardino County Mountains and San Bernardino and Riverside County Valleys-The Inland Empire. * WHEN...For the Wind Advisory, until 4 PM PST Friday. For the High Wind Watch, from late Friday night through Saturday afternoon. * IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel could be difficult, especially for high profile vehicles. Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

* WHAT...North winds 20 to 30 mph with gusts up to 50 mph expected through Friday. Gusts up to 55 mph expected on Saturday. * WHERE...Lake Mead National Recreation Area, Lake Havasu and Fort Mohave, and San Bernardino County-Upper Colorado River Valley. * WHEN...Until 10 PM PST /11 PM MST/ Saturday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Instances of blowing dust near dry lakebeds may result in reduced visibility. * ADDITIONAL DETAILS...Dangerous boating conditions expected on Lake Mead, Lake Mohave, and Lake Havasu, with wave heights between 2 and 4 feet. The strongest wind speeds will occur today and Saturday, with slightly slower speeds on Friday and during overnight periods.

* WHAT...North winds 20 to 30 mph with gusts up to 45 to 50 mph expected. * WHERE...Western portion of Joshua Tree National Park, Eastern portion of Joshua Tree National Park, Chuckwalla Mountains, Chiriaco Summit, Palo Verde Valley, and Chuckwalla Valley. * WHEN...From 7 AM this morning to 6 PM PST this evening. * IMPACTS...Difficult driving conditions, especially for larger vehicles traveling along roads with crosswinds. Light, unsecured objects may become airborne.