Higher than normal tides to cause minor coastal flooding this week

Higher than normal tides to cause minor coastal flooding this week
A file photo shows coastal flooding in Olowalu, Maui. Photo: Asa Ellison (Source: Asa Ellison)

HONOLULU, Hawaii (HawaiiNewsNow) - Record high tides are expected to cause nuisance coastal flooding for the next several days, according to the National Weather Service.

Ocean water levels have been up to ten inches above predicted levels in some areas.

The higher water levels are combining with astronomical high tides associated with the new moon, with the flooding possible during the highest tides in the early morning hours.

Forecasters said according to preliminary data, the observed water level at Honolulu Harbor at 6:06 a.m. Monday was 3.21 feet, which would be the highest daily mean water level ever observed at that location. The predicted high tide was 2.35 feet.

Sunday’s high tide at about 5 a.m. was 3.16 feet, well above the predicted high tide of 2.33 feet.

The extreme high tides may cause flooding of beach areas that are normally dry and some minor coastal erosion, as well as saltwater inundation of vulnerable low-lying roadways, docks, boat ramps and other coastal infrastructure.

Here are the predicted highest tides for Honolulu Harbor for the next few days:

  • Monday: 6:07 a.m., +2.35 feet (actual: +3.21 feet)
  • Tuesday: 7:02 a.m., +2.30 feet
  • Wednesday: 8:04 a.m., +2.20 feet
  • Thursday: 9:14 a.m., +2.09 feet
  • Friday: 10:24 a.m., +2.00 feet

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