* WHAT. North winds 20 to 30 mph with gusts up to 50 mph expected. Strongest winds are expected across the Delta and far western side of the Central Valley. * WHERE. Carquinez Strait and Delta, Central and Southern Sacramento Valley, Mountains Southwestern Shasta County to Western Colusa County, and Northern San Joaquin Valley. * WHEN. From 10 PM this evening to 6 PM PST Wednesday. * IMPACTS. Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

RED FLAG WARNING NOW IN EFFECT THROUGH THURSDAY MORNING FOR THE BAY AREA AND CENTRAL COAST AS STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS DEVELOP. .Strong offshore winds are increasing across the higher elevations of the Bay Area and Central Coast with strong winds becoming more widespread across the lower elevations this afternoon. North to northeasterly wind gusts will average between 25 and 50 mph, particularly across the higher terrain of the Santa Cruz Mountains, East Bay Hills, North Bay Mountains, as well as interior portions of Napa and Sonoma counties. In particular, these areas of Napa and Sonoma counties have an increased likelihood of wind gusts between 60 to 70 mph starting late Tuesday and continuing through the day on Wednesday. Afternoon humidity values will range between the single digits and 25 percent. Overnight humidity recovery will be poor with readings between 20 and 45 percent. The combination of the aforementioned winds and humidity will translate to fires exhibiting a large resistance to control and thereby creating a hazardous and extreme wildfire environment. Fire crews and residents are urged to remain abreast of the weather forecast over the next couple of days. * AFFECTED AREA. Fire Weather Zone 006 San Francisco, Fire Weather Zone 502 Marin Coastal Range, Fire Weather Zone 503 Sonoma Coastal Range, Fire Weather Zone 504 North Bay Interior Mountains, Fire Weather Zone 506 North Bay Interior Valleys, Fire Weather Zone 508 San Francisco Bay Shoreline, Fire Weather Zone 509 San Francisco Peninsula Coast, Fire Weather Zone 510 East Bay Interior Valleys, Fire Weather Zone 512 Santa Cruz Mountains, Fire Weather Zone 513 Santa Clara Valley Including San Jose, Fire Weather Zone 514 Eastern Santa Clara Hills, Fire Weather Zone 515 East Bay Hills, Fire Weather Zone 517 Santa Lucia Mountains and Los Padres National Forest, Fire Weather Zone 518 Mountains of San Benito County And Interior Monterey County including Pinnacles National Park and Fire Weather Zone 529 Northern Monterey Bay. * TIMING. 11 AM Tuesday until 7 AM Thursday. * WINDS. North 15 to 25 mph with gusts up to 50 mph. Across the North Bay Interior Mountains, gusts up to 60 to 70 mph. * RELATIVE HUMIDITY. Between 5 to 25 percent. * LIGHTNING. None anticipated. * IMPACTS. Despite recent rainfall, a long duration offshore flow event is anticipated. This will result in the rapid curing of fuels. The combination of strong winds and low humidity will cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended and may be prohibited in some areas.

* WHAT. North winds 20 to 35 mph with gusts up to 55 mph expected. * WHERE. Carquinez Strait and Delta, Central Sacramento Valley, Mountains Southwestern Shasta County to Western Colusa County, Northern San Joaquin Valley, and Southern Sacramento Valley. * WHEN. From 10 PM this evening to 6 PM PST Wednesday. * IMPACTS. Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

* WHAT. North winds 15 to 25 kt with gusts up to 45 kt and rough waters expected. * WHERE. San Pablo Bay, Suisun Bay, the West Delta and the San Francisco Bay north of the Bay Bridge. * WHEN. From 9 PM this evening to 9 AM PST Wednesday. * IMPACTS. Conditions will be hazardous to small craft.