A severe weather warning has been issued for Northland with thunderstorms and wind gusts of up 130km/h expected to lash the region later today.
Much of Northland was hit by thunderstorms and heavy rain on Saturday morning but the MetService is warning a second wave of wild weather, caused by a cold front currently south of New Zealand, is on its way.
In a warning issued early on Sunday the MetService said northwesterlies would strengthen in Northland and Auckland as the day wore on. A few gusts of 110km/h were possible from late morning in squally thunderstorms.
Overnight and early Monday morning northwest gales were expected with damaging gusts of 130 km/h in exposed places.
The wind should ease gradually towards midday Monday.
Boaties in particular are being urged to seek shelter and make sure their moorings are secure.
The last wild weather to hit Northland, on April 15-16, saw two boats break their moorings and run aground on the beach at Paihia.
Yesterday heavy rain contributed to a spate of crashes in Auckland, closing most of the city's arterial routes at some point.
They included a three-car crash on the Harbour Bridge which closed a northbound lane about 2pm, while surface flooding slowed traffic on the Northwestern and
Flooding was also reported in the Kaipara.