New wave of June “king tides” rolls into the islands

The king tides rolling in on the afternoon of Friday 23 July 2017 are poised to be among the highest in Hawai‘i since record-keeping started 112 years ago. By about 3 p.m., an hour before the highest tides are expected, streets in flood-prone Mapunapuna were already underwater. And in Waikiki, water levels were also visibly higher than normal.

It’s the second month in a row that shoreline communities are grappling with so-called king tides, or tides that are among the highest for a year. The impact of this month’s high tides are expected to be slightly less severe, however, because they won’t be accompanied by a south swell (which was the case in May).

“Instead of about a foot above normal, sea level anomalies will be down closer to about a half a foot, and the tides this month are just a little bigger than May,” said Matthew Widlanski, researcher at the University of Hawai‘i Sea Level Center (UHSLC).

The public is encouraged to help officials and researchers document the king tides by taking photos and entering them into a database to document king tides, compile and analyze data, and determine how future changes in sea level may impact coastal areas. You can enter photos into the database manually or using the phone app. Click here for step-by-step instructions.

Read more about it and watch the video reports at Hawaii News Now and KHON2. UPDATE 06-26-17: Read more about Friday’s high tides and see the video reports at Hawaii News Now and KITV4 here and here; read more about it in the UH System News.