* WHAT. Southwest winds 10 to 20 kt and choppy waters expected. * WHERE. San Pablo Bay, Suisun Bay, the West Delta and the San Francisco Bay north of the Bay Bridge. * WHEN. Until 9 PM PDT this evening. * IMPACTS. Conditions will be hazardous to small craft.

At 903 AM PDT, Doppler radar was tracking gusty showers along a line extending from near Vallejo to 18 miles west of Pacifica. Movement was southeast at 25 mph. HAZARD. Wind gusts up to 40 mph. SOURCE. Radar indicated. IMPACT. Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include. San Jose, San Francisco, Oakland, Fremont, Hayward, Sunnyvale, Concord, Santa Clara, Berkeley, Richmond, Antioch, Daly City, San Mateo, San Leandro, Livermore, Redwood City, Mountain View, Alameda, San Ramon, and Pleasanton.

At 844 AM PDT, Doppler radar was tracking gusty showers along a line extending from Willows to near American Canyon. This line is associated with the narrow cold-frontal rain band (NCFR). Movement was east/southeast at 15 mph. HAZARD. Wind gusts up to 40 mph. SOURCE. Radar indicated. IMPACT. Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include. Vallejo, Fairfield, Vacaville, Davis, Woodland, Benicia, Maxwell, Rumsey, Yuba City, Suisun City, Dixon, Rio Vista, Winters, Gridley, Colusa, Dunnigan, Tancred, Zamora, Collinsville, and Pennington.

* WHAT. West winds 10 to 20 kt and choppy waters. * WHERE. San Pablo Bay, Suisun Bay, the West Delta and the San Francisco Bay north of the Bay Bridge. * WHEN. Until 3 PM PDT this afternoon. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. West winds 25 to 35 mph with gusts 45 to 60 mph expected. Isolated gusts to 70 mph near Whitewater. * WHERE. San Gorgonio Pass Near Banning. * WHEN. From noon today to 8 PM PDT Sunday. * IMPACTS. Gusty winds could blow around unsecured objects. Tree limbs could be blown down. Reduced visibility in blowing dust.

The South Coast AQMD has issued an air quality alert due to increased particle pollution from blowing dust. The air quality alert is in effect from Saturday afternoon to Sunday evening. In areas directly impacted by high levels of windblown dust, limit your exposure by remaining indoors with windows and doors closed and avoiding vigorous physical activity. Run your air conditioner or an air purifier. If temperatures allow, avoid using whole house fans or swamp coolers that bring in outside air. Exposure to high particle pollution levels can cause serious health problems, including asthma attacks, heart and lung disease symptoms, and increased risk of respiratory infections. People with heart or lung diseases should follow their doctor's advice for dealing with episodes of unhealthy air quality. Children, older adults, and people with respiratory or heart disease should avoid prolonged exposure and strenuous activities when particle pollution levels are high. To help minimize outdoor particle pollution levels: * Carpool, telecommute, reduce trips, or take public transportation * Slow down if driving on dirt roads * Stabilize loose soils Levels of particle pollution can vary hour by hour and by location depending on wind conditions. To view current and forecasted air quality levels, visit the South Coast Air Quality Management District website at aqmd.gov or download the mobile app at www.aqmd.gov/mobileapp. Additional details for this air quality alert may be available at www.aqmd.gov/advisory.