Weather: Cyclone Debbie remnants to bring heavy rain, flooding to New Zealand

  • 01/04/2017
Road flooding

After thrashing Australia, ex-tropical cyclone Debbie is forecast to drench and possibly flood parts of New Zealand.

The weather system is moving across the Tasman Sea during the weekend and will soak New Zealand next week.

NIWA forecaster Ben Noll says heavy rain is likely for parts of the central and lower North Island from late Monday, reaching a peak on Tuesday before sliding toward the South Island on Wednesday.

The storm will both be slow to approach and depart because there is a blocking area of high pressure.

Effectively an atmospheric river of moisture is flowing toward New Zealand and is bumping up against the high pressure system to the south of the country.

The areas likely to be drenched depends on the track the storm takes.

At this stage the most likely areas to be flooded include Taranaki, Manawatu, Whanganui, the Wellington region, the top of the South Island and farther south along the West Coast.

The eastern Coromandel, Bay of Plenty, Gisborne, and Hawke's Bay should also be on guard for downpours, as east to northeast winds drive moisture onshore.

A secondary push of heavy downpours is possible on the North Island from late Wednesday into Thursday.

It is this latter push of the storm that is most likely to affect Auckland.