National weather update

Sunrise on Waitangi Day. Photo: Jennie Danby

The MetService advises that a large ridge of high pressure covering the country is expected to move slowly east on Monday, as a broad front approaches southern New Zealand.

This front is forecast to move east over the South Island during Tuesday and early Wednesday, delivering rain, and a cool southerly change in the south.

The front should then weaken as it moves east across the North Island on Wednesday, while a low approaches the South Island from the Tasman Sea.

There is some uncertainty with regards to the strength, speed and track of the low at this stage, and it will continue to be monitored.

On Thursday, a southwest flow should lie over the country and gradually ease.

There is moderate confidence of rainfall accumulations reaching warning amounts about Westland south of Greymouth later on Monday and Tuesday, with a low risk about the Fiords.

In addition, strengthening northerlies ahead of this front may approach severe gale about Fiordland south of Milford at times on Monday and Tuesday.

Then on Tuesday and Wednesday, there is low confidence of warning amounts of rain for Southland and coastal parts of Dunedin and Clutha, and also for Westland from Greymouth northwards, Buller and Nelson including the Richmond Range on Wednesday.

In addition, there is low confidence of severe gale northwesterlies about exposed parts of the Canterbury High Country, Marlborough, Wellington and southern Wairarapa on Tuesday and Wednesday.

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