* WHAT. West winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE. Apple and Lucerne Valleys, Riverside County Mountains, San Bernardino County Mountains, San Diego County Deserts, San Diego County Mountains, and San Gorgonio Pass near Banning. * WHEN. From 5 AM Monday to 5 AM PDT Wednesday. * IMPACTS. Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. For the deserts, there could be areas of blowing dust at times, which may temporarily restrict visibility below 1 mile.

* WHAT. For the desert slopes of the mountains, southwest to west winds 30 to 40 mph with gusts 50 to 60 mph. For the deserts, southwest to west winds 20 to 30 mph with gusts 40 to 55 mph, locally up to 65 mph through passes. * WHERE. Apple and Lucerne Valleys, Riverside County Mountains, San Bernardino County Mountains, San Diego County Deserts, San Diego County Mountains, and San Gorgonio Pass near Banning. * WHEN. From 5 AM Monday to 5 AM PDT Wednesday. * IMPACTS. Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. For the deserts, areas of blowing dust may temporarily restrict visibility.

* WHAT. For the desert slopes of the mountains, southwest to west winds 30 to 40 mph with gusts 50 to 60 mph. For the deserts, southwest to west winds 20 to 30 mph with gusts 40 to 55 mph, locally up to 65 mph through passes. * WHERE. Apple and Lucerne Valleys, Riverside County Mountains, San Bernardino County Mountains, San Diego County Deserts, San Diego County Mountains, and San Gorgonio Pass near Banning. * WHEN. From 5 AM Monday to 5 AM PDT Wednesday. * IMPACTS. Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. For the deserts, areas of blowing dust may temporarily restrict visibility.

* WHAT. For the desert slopes of the mountains, southwest to west winds 30 to 40 mph with gusts 50 to 60 mph. For the deserts, southwest to west winds 20 to 30 mph with gusts 40 to 55 mph, locally up to 65 mph through passes. * WHERE. Apple and Lucerne Valleys, Riverside County Mountains, San Bernardino County Mountains, San Diego County Deserts, San Diego County Mountains, and San Gorgonio Pass near Banning. * WHEN. Until 5 AM PDT Wednesday. * IMPACTS. Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. For the deserts, areas of blowing dust may temporarily restrict visibility.

* WHAT. For the desert slopes of the mountains, southwest to west winds 30 to 40 mph with gusts 50 to 60 mph. For the deserts, southwest to west winds 20 to 30 mph with gusts 40 to 55 mph, locally up to 65 mph through passes. * WHERE. Apple and Lucerne Valleys, Riverside County Mountains, San Bernardino County Mountains, San Diego County Deserts, San Diego County Mountains, and San Gorgonio Pass near Banning. * WHEN. Until 5 AM PDT Wednesday. * IMPACTS. Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. For the deserts, areas of blowing dust may temporarily restrict visibility.

* WHAT. For the desert slopes of the mountains, southwest to west winds 30 to 40 mph with gusts 50 to 60 mph. For the deserts, southwest to west winds 20 to 30 mph with gusts 40 to 55 mph, locally up to 65 mph through passes. * WHERE. Apple and Lucerne Valleys, Riverside County Mountains, San Bernardino County Mountains, San Diego County Deserts, San Diego County Mountains, and San Gorgonio Pass near Banning. * WHEN. Until 5 AM PDT Wednesday. * IMPACTS. Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. For the deserts, areas of blowing dust may temporarily restrict visibility.

* WHAT. Southwest to west winds 25 to 35 mph with gusts to 55 mph. Isolated gusts to 65 mph. * WHERE. Apple and Lucerne Valleys, Riverside County Mountains, San Bernardino County Mountains, San Diego County Deserts, San Diego County Mountains, and San Gorgonio Pass near Banning. * WHEN. Until 5 AM PDT Wednesday. * IMPACTS. Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

* WHAT. The South Coast AQMD has issued an air quality alert due to harmful levels of particle pollution from windblown dust. * WHERE. The Coachealla Valley and San Gorgonio Pass. * WHEN. 6 PM Sunday to 5 AM Wednesday. * IMPACTS. Particle pollution can get deep into the lungs and cause serious health problems such as asthma attacks, heart and lung disease symptoms, and increased risk of lung infections. Everyone can be affected, but sensitive groups such as people with lung or heart disease, older adults, people who are pregnant, children, and those who spend a lot of time outdoors are at greater risk.