...HIGH SURF ADVISORY IN EFFECT UNTIL 4 PM CHST THURSDAY... ...HIGH RIP CURRENT RISK IN EFFECT THROUGH THURSDAY AFTERNOON... * WHAT...For the High Surf Advisory, large breaking waves of 8 to 10 feet expected in the surf zone. For the High Rip Current Risk, dangerous rip currents expected. * WHERE...North facing reefs of the Marianas. * WHEN...Until 4 PM ChST Thursday. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water. * ADDITIONAL DETAILS...Surf will likely subside below hazardous levels Thursday afternoon, then rise again for the weekend. PRECAUTIONARY/PREPAREDNESS ACTIONS... Rip currents will be life threatening. Inexperienced swimmers should remain out of the water due to dangerous surf conditions. Rip currents will be life threatening. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. &&