Hail as big as 20c pieces hammers parts of Auckland

A MASSIVE cloud is looming over parts of the upper North Island, bringing with it hail up to the size of 20c pieces as well as thunderstorms.

Isolated heavy rain and hail began slowly sweeping through eastern Northland at 2.30pm and thunderstorms were a possibility later on, according to WeatherWatch.

In Bombay and the Hunua Ranges there had been patchy thunderstorms and hail showers.

WeatherWatch head analyst Philip Duncan said drivers should take care on the motorways, particularly between Whangaparaoa and Whangarei.

Te Atatu Peninsula was pelted with hailstones about the size of large peas at 1pm, Duncan said.

NZH - Helen Morrison

Similar weather conditions were reported in isolated areas further west, such as the Waitakere Ranges and Helensville.

And Whenuapai residents experienced thundery downpours this afternoon.

Duncan said sea breezes had brought in the wild weather and similar conditions were likely in other parts of the region later today.

"It's drifting eastward as it's developed. It will change every 30 minutes.

"These hail showers had been moving up the country since Friday. But this [shower] happened so quickly. "

NZH - Mark Rogers

Although there had been a slight temperature drop it was still reasonably warm out, he said.

Because conditions were changing so quickly Duncan recommended Aucklanders take care on the roads.

"If you're driving it will be very slippery."

Herald reader Tanya Lee Vranjes said the hail on Candia Rd in Swanson was so deep cars and trucks were sliding and she had to put her ute into 4WD.

But Metservice said the thunderstorms and hail were not severe enough to trigger a warning.

"We're not concerned for flashing flooding, the soil's too dry," meteorologist Georgina Griffiths said.

"Today is an excellent example of 'sunshine and storms' in Auckland. Two sea breezes collide, and if the atmosphere is unstable, localised showers form, sometimes even thunderstorms.

"In between, the weather is fine; underneath these showers, localised heavy rain can fall.

"It all depends on where you live whether you'll get wet, sunshine or hail."

Earlier today clear skies brought a nippy morning, but incoming cloud and rain will bring those temperatures up.

MetService meteorologist April Clark explains that Aucklanders woke up to a nippy 7°C today because of the nice clear skies that let any heat radiate away from the land. She warns that today's fine spells will move to rain throughout the week.

"For people in the city it's mainly a good day actually."

Clark said that while most of the country is fine the east coast is seeing the tail-end of some showers with Gisborne being the last to clear. Northland and the Bay of Plenty will get some isolated showers in the afternoon and evening.

"Basically it's fine and frosty for most with a few bits of cloud and a few showers on the west coast."

The capital will see a few isolated showers as you can "never trust Wellington in a southerly", Clark said. Christchurch and Dunedin will be fine with a northeasterly picking up in the afternoon and Whangarei might get a shower or two in the morning before it clears.

Tomorrow a front starts moving over the country from the west. It'll bring showers and rain to the South Island on Tuesday evening before hitting the North Island early Wednesday morning. Clark says that it will bring a few strong winds and a showery low will follow.

"Obviously it'll be worse in the west than the east.

"Things do clear up when rain goes through so there'll be fine periods as well."



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