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Home / The Country

Dangerous coastal conditions: Giant wave warning for western New Zealand

NZ Herald
16 Jul, 2021 12:13 AM4 mins to read

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Waves of up to 5m are set to lash western coastlines of both islands over the coming 24 hours, prompting a warning to those living close to the water. Photo / Supplied

Waves of up to 5m are set to lash western coastlines of both islands over the coming 24 hours, prompting a warning to those living close to the water. Photo / Supplied

Towering waves are set to pummel the western seaboard of New Zealand this weekend, with forecasters warning of dangerous coastal conditions.

Large seas of up to 5.5m are set to start to swamp western coastlines from this afternoon and not ease off until late Sunday for some places.

It comes as the entire North Island sits under a swathe of strong-wind warnings and watches and the west coast of the South Island faces a deluge of rain for what promises to be a stormy weekend across the country.

MetService says the waves, fueled by very strong northwesterly winds, are so large they are likely to cause dangerous coastal conditions for western communities.

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People living by the sea in affected communities are urged to take care around roads, particularly on the west coast of the North Island and the top of the South Island.

MetService forecaster Mmathapelo Makgabutlane said a heavy swell alert had been issued for western regions of both islands.

The waves would start rising at the bottom of the North Island between Otaki and Waitotara from tonight and not ease off until tomorrow afternoon.

She said at their maximum height they would reach 5m tomorrow morning.

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Further north along the Taranaki coast between Mokau and Opunake the waves would hit later tonight and rise up to 5m in the morning for a spell. The waves were not expected to ease until Sunday.

Dangerous Coastal Conditions 🌊

Very strong northwesterly winds are generating large waves for western areas of the country.

Take care around roads and communities near the western coasts (and northern part of SI).

Wave forecasts found here: https://t.co/jLrDxvcFrU ^Lewis pic.twitter.com/XklJ3ts63t

— MetService (@MetService) July 15, 2021

Makgabutlane said the mountainous waves were a combination of swells and wind effects.

"We've got very strong winds starting from today already across the North Island and parts of the South Island so that is generating very wind-driven waves," she said.

The latest weather alert now has the entire North Island under a strong wind watch, with Taranaki and Wellington at warning levels. Damaging gales of up to 140km/h are forecast to barrel through the regions and not expected to ease off until tomorrow evening.

Parts of Bay of Plenty and Taranaki sit under a rain warning, with up to 120mm of rain expected to fall across the weekend.

MetService is warning heavy falls may lead to flooding and slips, with driving in the areas hazardous for motorists.

🔺🟧🟡

Our colour coded warning system is being used to it's full extent today!

The most impactful weather is expected within the Red Warning area but our Severe Weather forecasts covers wind & rain for many regions.

Get all the info here: https://t.co/qHyE5zhh6X ^Lewis pic.twitter.com/F9ub8yDnvV

— MetService (@MetService) July 15, 2021

A rare rain red alert sits over Buller and Westland north of Fox Glacier on the West coast, with surrounding regions under warnings and watches.

Thunderstorms are expected to lash the region, with up to 400mm of rain expected in total across the weekend.

People are being warned the deluge is likely to lead to significant flooding which threatens to cut off communities and lead to dangerous river conditions.

There are also road snowfall warnings for two alpine passes this weekend, with up to 1cm expected to settle on the summit routes.

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When it rains, it pours.

Not only is torrential rain on Mother Nature’s menu, but howling winds are too 😵‍💫

On Saturday, they’ll sweep across the North Island.

Potential impacts: downed trees & powerlines, damage to some structures, and difficult driving conditions. pic.twitter.com/F0Z5kaKBv7

— NIWA Weather (@NiwaWeather) July 15, 2021
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