Aucklanders said goodbye to the idea of an early summer as heavy hail moved across the central city.
The hailstorm first attacked the North Shore on Tuesday morning, forcing cars to pull over in Glenfield. The wintry weather then targeted the CBD.
Hail battered buildings in Mt Eden at noon today, including the MediaWorks building.
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Mt Wellington took a pelting just after 2pm, and the weather seems to be here to stay.
While there is no severe weather watch currently in place, MetService spokesperson Claire Flynn says most of the North Island could still get "some decent hail and some fairly heavy rain".
Thunderstorms are predicted to roll in throughout the week, possibly easing later in the week. The storms are caused by what Ms Flynn calls it a "cold pull, where cold air is high up in the atmosphere and warm air is pulled upwards, creating the thunderstorms".
Another spokesperson for MetService, Leigh Matheson, explains hail requires water to freeze within convective clouds. The unseasonable weather is being caused by a "large cluster" of these hail-causing clouds heading over central Auckland today.
Ms Flynn says Auckland residents shouldn't get their hopes up for the return of the summery weather - storms and hail are predicted to last until at least Thursday.