High Surf, Jan. 11 Weather Alert NWS. …HIGH SURF ADVISORY IN EFFECT FROM 10 AM THURSDAY TO 4 AM PST FRIDAY… The National Weather Service in Medford has issued a High Surf Advisory…which is in effect from 10 AM Thursday to 4 AM PST Friday. * Waves and Surf…Breaker heights 24 to 26 feet. * Timing…The surf will build Thursday morning, then subside late Thursday night. * Impacts…The entire coast will be impacted by the high surf. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD Precautionary/preparedness actions… A High Surf Advisory means that high surf will affect beaches in the advisory area, producing rip currents and localized beach erosion. Stay off of jetties and piers, as they can be inundated by heavy surf, sweeping people and debris into the water.