* WHAT...For the Gale Warning, northwest winds 20 to 30 kt with gusts up to 40 kt and seas 9 to 11 feet expected. For the Small Craft Advisory, northwest winds 20 to 25 kt with gusts up to 35 kt and seas 7 to 11 feet. * WHERE...Waters from Cape Mendocino to Pt. Arena CA from 10 to 60 nm. * WHEN...For the Gale Warning, from 3 PM this afternoon to 9 PM PDT this evening. For the Small Craft Advisory, until 3 PM PDT this afternoon. * IMPACTS...Strong winds will cause hazardous seas which could capsize or damage vessels and reduce visibility. * ADDITIONAL DETAILS...Winds are expected to be strongest directly south of Cape Mendocino in the eastern half of the marine forecast zone. 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.