* WHAT...For the Hazardous Seas Warning, very steep and hazardous seas 10 to 14 feet and north winds 20 to 30 kt with gusts up to 35 kt expected. For the Gale Warning, north winds 25 to 30 kt with gusts up to 40 kt and seas 10 to 14 feet expected. For the Small Craft Advisory, north winds 15 to 25 kt with gusts up to 35 kt and seas 8 to 12 feet. * WHERE...Waters from Pt. St. George to Cape Mendocino CA from 10 to 60 nm. * WHEN...For the Hazardous Seas Warning, from midnight tonight to 9 PM PDT Friday. For the Gale Warning, from 9 PM Friday to 9 PM PDT Saturday. For the Small Craft Advisory, until midnight PDT tonight. * IMPACTS...Strong winds will cause hazardous seas which could capsize or damage vessels and reduce visibility. Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe conditions.