This has seen MetService issue heavy rain watches for these areas.
In the North Island, the eastern ranges of Bay of Plenty, Waitomo, Taumarunui, Taupō, Tongariro National Park and North Taranaki including the Mountain/Taranaki Maunga are all under a heavy rain watch until Sunday evening or early Monday morning.
The forecasting agency warns these areas could see periods of heavy rain with thunderstorms possible, with rainfall amounts approaching warning criteria.
In the South Island, the Westland District south of Franz Josef and Fiordland are all in the firing line and under a heavy rain watch.
“Periods of heavy rain are forecast for parts of the central North Island tomorrow, mainly about the hill country and ranges,” MetService said on Saturday.
“Another burst of heavy rain is expected for Fiordland and southern Westland tonight and tomorrow. Surface flooding and slips are a risk, especially considering the large amount of rain that has already fallen there this week.”
On top of the bad weather expected for large parts of the North Island on Sunday, NIWA says the upper half of the island will see the return of humid weather, giving it a “tropical feel”.
“Dew point temperatures, a measure of moisture, will increase noticeably this weekend,” NIWA said.
“In fact, with air coming from the northwest, much of the upper-half of the North Island will have a tropical feel on Sunday.”