* Winds...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.

* Humidity...Daytime minimum humidity 10 to 25 percent. Overnight maximum humidity 35 to 50 percent.

* Highest Threat...West half of the Sacramento Valley and Delta area.

* Impacts...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended.

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* 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.