Thunderstorms, heavy rain, and high winds come with warning locals in the region to prepare for possible flooding, wind damage and tornados in isolated areas.
Metservice has forecast an unstable airmass with embedded troughs to hit the upper North Island this evening, overnight and into Saturday morning.
Thunderstorms are likely and there is a risk of downpours with rainfall intensities of 25 to 35mm per hour.
This will be in much of Northland, Auckland, Coromandel, the north of Waikato and the far west of the Bay of Plenty.
There is also a risk of tornadoes with strong wind gusts.