MetService is warning of further rainfall for Auckland after unprecedented rain struck the region on Friday.
"The main rain band has moved off to the east of Auckland for the time being and there are a number of Orange Warnings and Watches in place around the North Island," said MetService meteorologist Angus Hines.
"The main rain band returns to Auckland and Northland later on Sunday but rain will come and go for many areas in the North Island."
While it shouldn't match the intensity of what has been, impacts are expected to be severe and wide-reaching.
More flooding will occur through many northern regions in the coming days, and people should stay abreast of the latest information from local emergency management, Civil Defence and metservice.com.
Thunderstorm Outlook
MetService has issued a Severe Thunderstorm Watch for Northland, Auckland, Waikato, Waitomo, Taumarunui, and Taranaki with humid and unstable conditions expected to continue. This lasts until 9pm on Saturday.
"Thunderstorms are expected this afternoon and evening, with some of them becoming severe about western areas of Northland south of Dargaville, through western areas of Auckland and about Waikato west of Hamilton, in Waitomo, Taumarunui and northern Taranaki until 9pm," MetService said on its site.
"Severe Thunderstorms may produce downpours with intensities of 25 to 40 mm per hour. Rainfall of this intensity can cause surface and/or flash flooding, especially about low-lying areas such as streams, rivers or narrow valleys, and may also lead to slips. Driving conditions will also be hazardous with surface flooding and poor visibility in heavy rain."
There's also the possibility of thunderstorms about the Bay of Plenty and Taupo on Saturday and Sunday.
"Between early afternoon today and 7am Sunday morning, one or two these thunderstorms may become severe, producing localised downpours with intensities of 25 to 40mm per hour," MetService warned.
"Rainfall of this intensity can cause surface and/or flash flooding, especially about low-lying areas such as streams, rivers or narrow valleys, and may also lead to slips. Driving conditions will also be hazardous with surface flooding and poor visibility in heavy rain."
Further heavy rain for parts of the North Island
Heavy Rain Warning - Orange
Impact: Heavy rain may cause streams and rivers to rise rapidly. Surface flooding and slips are also possible and driving conditions may be hazardous.
Area: Coromandel Peninsula
Period: 16hrs from 10pm Sat, 28 Jan - 2pm Sun, 29 Jan
Forecast: Expect 80 to 120 mm of rain, with the largest amounts likely about the ranges. These amounts are in addition to the rain that has already fallen. Peak intensities of 15 to 25 mm/h, but possibly 25 to 40 mm/h in thunderstorms bringing localised downpours. Note, showers are likely during Sunday afternoon and evening, and some could be heavy with thunderstorms also possible.
Area: Bay of Plenty from Kawerau westwards
Period: 15hrs from 8pm Sat, 28 Jan - 11am Sun, 29 Jan
Forecast: Expect 80 to 120 mm of rain in addition to what has already fallen. Peak intensities of 15 to 25 mm/h, but possibly 25 to 40 mm/h in thunderstorms bringing localised downpours. Note, showers are likely during Sunday afternoon and evening, and some could be heavy with thunderstorms also possible.
Area: Bay of Plenty east of Kawerau, and Gisborne north of Ruatoria
Period: 4hrs from 8pm Sat, 28 Jan - midnight Sat, 28 Jan
Forecast: Expect another 20 to 40 mm of rain, with the largest amounts likely about the ranges. Peak rates of 15 to 25 mm/h. Note, further rain or showers are expected on Sunday, which could be heavy at times with thunderstorms also possible.
Heavy Rain Watch
Area: Auckland including Great Barrier Island
Period: 24hrs from 6am Sun, 29 Jan - 6am Mon, 30 Jan
Forecast: Showers are likely, but a period of heavy rain is possible during Sunday that may continue into Monday morning. Thunderstorms are also possible Sunday afternoon and evening.
Area: Taupo
Period: 15hrs from 8pm Sat, 28 Jan - 11am Sun, 29 Jan
Forecast: Periods of heavy rain, with thunderstorms possible. Rainfall amounts may approach warning criteria.
Area: Hawke's Bay south of Wairoa
Period: 7hrs from 8pm Sat, 28 Jan - 3am Sun, 29 Jan
Forecast: Periods of heavy rain, and amounts may approach warning criteria.
Forecast: Periods of heavy rain. Thunderstorms possible for northern parts of Taranaki and inland Whanganui. Rainfall amounts may approach warning criteria. Please note, all of the Taranaki region is now covered by this Heavy Rain Watch, including the Mountain.
Area: The eastern hills of Wellington
Period: 8hrs from 4pm Sat, 28 Jan - midnight Sat, 28 Jan
Forecast: Periods of heavy rain. Rainfall amounts may approach warning criteria.
Strong Wind Watch
Area: Horowhenua Kapiti Coast, Wellington and the Marlborough Sounds
Period: 13hrs from 9am - 10pm Sat, 28 Jan
Forecast: Southeasterly winds may approach severe gale at times.
