A High Surf Advisory has been issued for all Hawaii Island shorelines beginning Wednesday morning (December 2nd) and nuisance coastal flooding is also expected to coincide with high surf.
Published by: HIRSC - Weather Team
...HIGH SURF ADVISORY IN EFFECT FROM 6 AM WEDNESDAY TO 6 PM HST THURSDAY... * WHAT...Surf heights over 8 feet. * WHERE...West facing shores of the Big Island. * WHEN...From 6 AM Wednesday to 6 PM HST Thursday. * IMPACTS...Moderate. Expect strong breaking waves, shore break, and strong longshore and rip currents making swimming difficult and dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Beachgoers, swimmers, and surfers should heed all advice given by ocean safety officials and exercise caution.
...COASTAL FLOODING AND HARBOR SURGES POSSIBLE DUE TO LARGE NORTHWEST SWELL AND HIGH TIDE... A large northwest swell arriving today will drive surf heights along exposed north and west facing shores well above warning levels Tuesday night through Thursday. The combination of water levels running higher than predicted and the swell`s peak coinciding with the daily high tide early Wednesday morning could lead to coastal and harbor impacts, including salt-water inundation over roadways and coastal erosion. Areas not exposed to the northwest swell may also experience nuisance coastal flooding due to the high tides. These areas may see some flooding of beaches that are normally dry, some minor coastal erosion, and salt water inundation of typically vulnerable low-lying areas. For these areas, the most likely time of impact will be during the early morning hours today and tomorrow. Visit tidesandcurrents.noaa.gov for information about predicted astronomical tides and observed water levels in your area.