• Tropical Cyclone Tam is heading towards New Zealand, bringing 100km/h winds to Auckland, Northland and the Coromandel.
• Thousands of Northland homes were earlier this morning without power after severe winds toppled trees on to powerlines.
• Emergency Management teams are urging people to secure outdoor furniture, clean drains and gutters and prepare ahead for road travel and potential power outages.

A yacht has sunk and more than 180 Northland homes are still without power after severe wind gusts toppled trees, downing powerlines, as Tropical Cyclone Tam bears down on New Zealand.

And late this morning Aucklanders were being warned to prepare for “messy” weather tomorrow.

“Thursday’s looking quite messy, with really strong winds - gale-force through to midnight on Friday morning,” Auckland Emergency Management general manager Adam Maggs said in a video posted on social media channels.

“And we’re going to get heavier rain right throughout the early morning and throughout the day.”

Maggs urged motorists to “take care”, including also checking the weather at their destinations “just to make sure you can be safe on the roads”.

Electricity distribution network provider Counties Energy also urged residents in southern Auckland and northern Waikato “not to be complacent”, warning some rural areas could be without power for days, depending on the impact of the severe weather.

“The advice we’ve received is not to be complacent. If we experience widespread outages, please be aware that restoration times may be prolonged, especially in rural areas”, general manager of operations Dale Carline said.

“In some cases, power could be out for days if the network sustains major damage. Slips and fallen trees may block access, and complex repairs in challenging terrain can take time to resolve safely.”

They had response teams on standby and were planning for any large scale impacts, but he urged residents to also “act now” to prepare.

At the top of the country Northland harbourmaster Jim Lyle confirmed a 12m concrete yacht had sunk at Totara North.

Lyle said it was not considered a navigational hazard and there was nothing that could be done about it until the storm had passed.

Thames-Coromandel District Council’s incident management team had also been activated, and was preparing for potential flood and wind damage, civil defence and emergency manager for Coromandel Brian Carter said this morning.

MetService said this morning the fierce storm was currently sitting 450km southeast of New Caledonia and tracking southwards towards New Zealand, to sit a few hundred kilometres west of the North Island tonight.

This morning’s power cuts in Northland were affecting main areas south of Whangārei in Maungakaramea - where 130 homes are without power - and Waipu Cove areas, where 54 homes are without electricity due to broken power lines, Northpower said.

It was not yet known when power will be returned.

Power had been restored to the Whangārei suburb of Raumanga, where almost 1000 homes and businesses were left in the dark earlier today.

But hours later another 1000-plus properties were in the dark across the region.

In Mangawhai central, about 280 customers had been without power since 11.50am due to an unknown fault.

In Morningside, about 370 customers have been without power since 11.40am, with reports of a tree on the line.

In Whakapirau, 240 customers have been without power since 11.10am due to an unknown fault.

Meanwhile Top Energy were investigating four outages at Awanui, Mangōnui, Kawakawa and Ōmāpere which had left over 650 without power.

Although the cyclone is still not expected to strike the country directly, its impacts are expected to be felt across the upper North and will last through to the weekend.

Tropical Cyclone Tam, named last night by the Fijian Meteorology Service, is expected to be downgraded again to a storm as it tracks west of Cape Rēinga and down through the Tasman Sea.

STORY CONTINUES AFTER LIVEBLOG

STORY CONTINUES 

MetService meteorologist Juliana Bergdolt said Fiji would hand over responsibilities for tracking and measuring Cyclone Tam to New Zealand at 6am today. 

She said MetService would be liaising with Northland and Auckland Emergency management this morning after analysing the cyclone to see if any warnings or watches needed to be upgraded. 

Bergdolt said MetService is continuing to forecast severe winds and heavy rain for the upper North Island and 4mm of rain had already fallen in Northland overnight. 

In an update overnight, the Fiji Meteorological Service said the cyclone was moving south at 20 knots or 37km/h. The wind close to the centre was 45 knots, or 83km/h, but is expected to drop to 30 knots, or 56km/h, within 24 hours. 

The map showed the cyclone hitting far west of the country, however, this does not mean its impacts could not still be severe. 

The Fiji Metservice said the cyclone was moving south at a speed of 20 knots, or 37kph. The latest map shows it hitting fat west of the country. 

Heavy rain is expected to lash Northland for more than 41 hours with residents being told to expect 120 to 180mm of rain. 

A heavy rain warning came into effect at 3am. 

“[The] rain [is] easing for a time Wednesday afternoon and evening. 

“Peak rates of 15 to 25 mm/h likely on Thursday with possible thunderstorms.” 

A strong wind watch for the region is forecast to begin at 3pm and will last until 8pm tomorrow. 

MetService’s forecast is for “severe gale easterlies gusting 120km/h in exposed places, with damaging gusts of 140km/h possible overnight Wednesday and Thursday morning, especially in the north.” 

A strong wind watch is set to begin for the Auckland region at 9pm and last until midnight Thursday. 

MetService said on its website: “Damage to trees, powerlines, and unsecured structures possible. Driving may be difficult, especially for high-sided vehicles and motorcycles.” 

Heavy rain watches have also been issued for Auckland, Great Barrier Island and the Coromandel starting from 3am tomorrow until early Friday morning. 

As Niwa (the National Institute of Water and Atmospheric Research) put it in a post on X: “The weather could get pretty gnarly”. 

MetService meteorologist Alec Holden agreed with the Fijian Meteorologist Service’s labelling of the storm as a tropical cyclone. 

“On our own tropical cyclone activity page, we have it increasing from a tropical depression to a category one cyclone,” he said. 

“We have a moderate to a high risk of it upgrading.” 

Holden said it wasn’t likely to last as a cyclone when it reached New Zealand. 

“It will have a brief flirt with becoming a tropical cyclone, but when it travels lower into the latitudes, that will transition back. 

Five and 6-metre swells have also been predicted for Northland, north Auckland, Coromandel and Gisborne. 

The Auckland Harbour Bridge could be closed or have speeds lowered at short notice and motorists should be careful on the roads, NZ Transport Agency Waka Kotahi said. 

Auckland Transport said public transport could be affected due to a higher risk on the roads. 

“We’re advising Aucklanders to be safe and plan ahead. There will be a higher safety risk out on the roads, and some public transport services may also be affected - especially ferries,” a spokesperson said. 

Auckland Emergency Management general manager Adam Maggs told Newstalk ZB that residents should prepare their houses for the storm. 

“That means moving and securing outdoor furniture and clearing drains and gutters,” he said. 

“If our community sees there is a stormwater blockage, call Auckland Council and we will be able to deal with that.” 

Maggs also advised Auckland residents to put their rubbish bins out on the day of collection rather than the night before. 

He also said people should report downed trees on the Auckland Council website so arborists could quickly remove them. 

Maggs suggested Auckland residents should create a plan and check their emergency supplies if power was to go out. 

David Williams is an Auckland-based Multimedia Journalist who joined the Herald in 2023. He covers breaking news and general topics.