High Surf Advisory issued December 20 at 3:37PM HST until December 21 at 6:00PM HST by NWS
...HIGH SURF WARNING FOR NORTH AND WEST FACING SHORES OF NIIHAU KAUAI OAHU AND MOLOKAI AND FOR NORTH FACING SHORES OF MAUI AND FOR WEST FACING SHORES OF THE BIG ISLAND UNTIL 6 PM H…