Sour weather brought on by a "mean low'' over the North Island will be in full force by this afternoon.
Much of the North Island has been slapped with severe weather warnings and watches, with Northland already seeing the beginning of the wet and windy conditions expected over the next two days.
MetService meteorologist Dan Corbett said the bad weather was expected to hit Northland, Auckland and Coromandel by this afternoon.
Wind speeds could reach up to 130km/h in the three regions - placing them on a severe wind warning.
Eastern Waikato residents have also been warned to expect "potentially dangerous'' gusts by this evening.