An orange heavy rain warning is in force for Gisborne, with Metservice warning residents to expect 60 to 100 milimetres of rain on top of what has already fallen, before 6am tomorrow.
There is also a heavy rain watch for the Coromandel Peninsula and the eastern Bay of Plenty, while a thunderstorm watch is also in place for Northland, Auckland and the central North Island.
Metservice meteorologist Lewis Ferris spoke to Charlotte Cook.
