High tides for Raglan - NIWA

Nov 15-16: Super moon high tides

Request from WRC, 11 November 2016

She’s going to be a big one and so are the high tides.

The coming super moon event (14 to 18 November) will bring a series of king tides on Waikato’s coasts raising high tide levels to 100-year peaks (not counting potential sea level rise due to climate change or storms).

And Waikato Regional Council is keen for citizen photographers to send in their snaps to help staff build their understanding of where tides reach under such extreme conditions.

“We’d really appreciate any photos people take so that we can document what’s happening and get a clearer picture of potential coastal hazards,” said senior regional hazards advisor Rick Liefting.

High tides for Raglan – NIWA

The highest tides over the week for Raglan and other parts of the west coast of the Waikato will be Tuesday 15 November around 10.45 am and Wednesday 16 November around 11.30 am. 

On the Firth of Thames coasts they will be on Wednesday 16 November around 9 am and Thursday 17 November around 10 am.  On the east coast of the Coromandel they’ll occur on Thursday 17 November around 9.30 am and Friday 18 November around 10.30 am.

People can email their photos along with their observations and locations to coastalinundationtool@waikatoregion.govt.nz.

They can also use the council’s coastal inundation modelling tool to see where the king tides are likely to reach. It’s available at www.waikatoregion.govt.nz/coastal-inundation-tool/

“The ‘Max Tide’ figures on that site show maximum high tides levels, not taking into account any storm or wave effects and also don’t account for any projected sea level rise under global warming.  However, the tool can be used to see what impact future projected rises in sea level may occur.  The king tides next week are expected to be at around those ‘Max Tide’ levels due to the super moon’s impacts,” said Mr Liefting.

A king tide at Whitianga in February 2014 – WRC

He said the council’s regional hazards team will issue advice if the king tides are likely to coincide with weather or wave conditions that would lead to any heightened risks for communities.

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