* WHAT...Very steep and hazardous seas 7 to 12 feet and northwest winds 20 to 30 kt with localized gusts to 40 kt.
* WHERE...Coastal waters from Cape Mendocino to Pt. Arena CA out 10 nm.
* WHEN...Until 6 AM PDT Thursday.
* IMPACTS...Very steep and hazardous seas could capsize or cause damage to vessels.