* WHAT...Large waves and hazardous surf conditions. Breakers up to 25 to 30 feet. * WHERE...North and Central Coast of Oregon, and South Washington Coast. * WHEN...Until 10 AM PST Monday. * IMPACTS...Destructive waves may wash over beaches, jetties, and other structures unexpectedly. People can be swept off rocks and jetties and drown while observing high surf. Minor beach erosion may damage coastal properties and buildings. Higher than normal water run-up is expected on beaches and low- lying shoreline. * ADDITIONAL DETAILS...The threat of sneaker waves is extreme during these scenarios. Sneaker waves can suddenly knock people off of their feet and quickly pull them into the frigid ocean which may lead to serious injury or drowning.