MetService has issued the North Island with a number of weather watches and warnings from Thursday to Friday.
In MetService's latest severe weather forecast, conditions are expected to be "stormy" over the eastern coasts from Northland to Bay of Plenty, with waves expected to reach 3-5 meters.
"This in addition to the heavy rain forecast will make these coasts vulnerable to damage so be prepared and keep safe," MetService said in a tweet.
From 7pm Thursday to 7pm Friday, heavy rain and strong wind watches have been issued for Northland. From Thursday rain is likely to become heavy from the evening and continue into Friday. MetService warns the amount of rainfall could justify the watch being upgraded to a warning.
A strong wind watch has also been issued for the Bay of Islands.
MetService has issued Auckland north of Takapuna and Great Barrier Island with a heavy rain watch from 9pm Thursday to 9pm Friday.
"Periods of rain from late Thursday, likely to become heavy overnight and continue during Friday. Rainfall amounts may approach warning criteria," says MetService's website.
Auckland north of the Harbour Bridge including Great Barrier Island and Coromandel Peninsula has been issued with a strong wind watch from 6pm Thursday to 6pm Friday.
Moving further south, Coromandel Peninsula has been issued with a heavy rain warning from 1am Friday to 1am Saturday. Up to 100 to 140mm of rain at the peak rate of 15 to 25mm/h is expected to fall.
"Heavy rain may cause streams and rivers to rise rapidly. Surface flooding and slips are also possible and driving conditions may be hazardous."
Continuing further down the motu, the Bay of Plenty including Rotorua is under a heavy rain watch for 18 hours from 9am Friday to 3am Saturday. MetService warns periods of heavy rainfall could see the watch upgraded to a warning.
For Gisborne north of Tolaga Bay, MetService issued a heavy rain watch from 10am Wednesday to 6pm. While that watch has ended, MetService forecasts further heavy rain on Friday could see a watch or warning be issued.
In a tweet, MetService said there is still some "uncertainty" in the details of the latest front, but urged Kiwis in the affected regions to stay updated on their website.
