EVENTS: The National Weather Service has continued the HIGH SURF WARNING for NORTH and WEST FACING SHORES of MOLOKAI and NORTH FACING SHORES OF MAUI and a HIGH SURF ADVISORY for WEST FACING SHORES of MAUI, LANAI and KAHOOLAWE, in effect until 6:00 p.m. Thursday.
A High Surf Warning means that dangerous, battering waves will pound the shoreline. This will result in very dangerous swimming conditions, and deadly rip currents.
EFFECTS: A very large, long-period west-northwest swell will build rapidly tonight, bringing dangerously large surf to many areas, with the potential for damaging surf. Due to the westerly component of the swell, elevated surf will impact areas that are not normally affected by winter swells including the west facing shores of Lanai.
Peak surf heights will be 30 to 40 feet along north and west facing shores of Molokai and Maui. Surf heights will be 15 to 25 feet along west facing shores of Molokai. Peak surf heights will be 12 to 15 feet along west facing shores of Maui. Surf heights will be 6 to 10 feet along west facing shores of Lanai and Kahoolawe.
Forecast surf heights are estimates of the height of the face or front of waves.
EXPECT OCEAN WATER SURGING AND SWEEPING ACROSS BEACHES, COASTAL BENCHES AND LAVA FLOWS, CREATING THE POTENTIAL FOR IMPACTS TO COASTAL PROPERTIES AND INFRASTRUCTURE, INCLUDING ROADWAYS. POWERFUL LONG SHORE AND RIP CURRENTS WILL BE PRESENT AT MOST BEACHES. LARGE BREAKING WAVES AND STRONG CURRENTS MAY IMPACT HARBOR ENTRANCES AND CHANNELS CAUSING CHALLENGING BOAT HANDLING.
PRECAUTIONARY MEASURES: THESE DANGEROUS CONDITIONS MEAN THAT ONLY HIGHLY EXPERIENCED PERSONS SHOULD ENTER THE WATER. INEXPERIENCED PERSONS SHOULD REMAIN OFF BEACHES AND ADJACENT BEACHFRONT AREAS. LARGE BREAKING SURF, SIGNIFICANT SHOREBREAK AND DANGEROUS CURRENTS, MAKE ENTERING THE WATER VERY HAZARDOUS. ANYONE ENTERING THE WATER COULD FACE SIGNIFICANT INJURY OR DEATH.
INFORMATION: Maui County Civil Defense will continue to monitor the situation. Please listen to your local radio and TV stations or NOAA Weather Radio broadcasts for any updates. NOAA Weather Broadcasts can be reached by calling 1-866-944-5025. NOAA Weather Internet services can be found at www.prh.noaa.gov/hnl.
Pre-recorded advisories and notifications are available 24-hours a day on the Maui County Automated Information System (AIS) by calling 986-1200.