King Tides

[Eric1600]

Leilanidude always the contrarian. Nice guess, but it's not right. This is a well known aspect of tidal gauge data in the islands and the record was set on Oahu, which data shows is not sinking. The trend of rising tides can be correlated to a decade of differential GPS measurements at those tidal stations. Scientists, like at NOAA, are well aware of land effects and tide levels when analyzing the data for long term trends.

Since 1946, sea level at Hilo on the Big Island of
Hawaii has risen an average of 1.8 ± 0.4 mm/yr faster than
at Honolulu on the island of Oahu. This difference has been
attributed to subsidence of the Big Island. However, GPS
measurements indicate that Hilo is sinking relative to
Honolulu at a rate of 0.4 ± 0.5 mm/yr, which is too small
to account for the difference in sea level trends.

http://onlinelibrary.wiley.com/doi/10.10...021380/pdf

NOAA says the tides that day reached a record of 3.08 feet, the highest in the 112 years since tide data has been monitored. Also you can see expected vs. verified for that month:

https://tidesandcurrents.noaa.gov/waterl...id=1612340&units=standard&bdate=20170525&edate=20170531&timezone=GMT&datum=MLLW&interval=hl&action

AND you and see NOAA's detailed trend for sea levels which includes characterization of sinking/rising reference stations:

https://tidesandcurrents.noaa.gov/sltrends/slrmap.htm

and their data

https://tidesandcurrents.noaa.gov/sltren...6686AEFDF2