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Tasman Tempest takes its toll

NZ Newswire logoNZ Newswire 13/03/2017

Emergency services respond as Great North Road in New Lynn is closed due to extensive flooding on March 12. © Fiona Goodall/Getty Images Emergency services respond as Great North Road in New Lynn is closed due to extensive flooding on March 12. As the clean-up continues from the past week's storm, figures show that some parts of the North Island had as much rain in a day as would be typical for the whole of March.

NIWA meteorologist Ben Noll says other milestones included instances of one-in-100-year rain and Kaitaia's wettest March hour on record.

He says the structure of the "Tasman Tempest" was similar to a tropical cyclone.

The good news is that the weather outlook is bright for those fed up with the wet.

"For those looking to have some late-season beach days, next weekend is looking pretty fabulous across the upper North Island," Mr Noll said.

"And here's the silver lining: The Tasman Tempest caused some warming of the sea temperatures around the northern portion of the country as warm winds blew from the north for many consecutive days."

Through to the end of the month, high pressure would be favoured to the west and over the country, leading to long stretches of dry weather and sunshine with temperatures near or above average.

SOME STORMY STATS

* Whangamata had 260mm of rain in 24 hours from Tuesday into Wednesday, one-and-a-half times the normal rainfall for the whole of March;

* Over five days to Sunday, Whangamata had 475mm of rainfall, the highest total at one location during the storm, and more than the normal rainfall for the entire autumn;

* The 225mm that fell in Upper Hunua in 12 hours from Tuesday night exceeded a one-in-100 event;

* Early on Saturday, Kaitaia had its wettest March hour on record - 44.6mm - since hourly records began in 1962;

* Auckland (Mangere) tied its wettest March hour on record - 27.6mm on Friday afternoon - since hourly records began in 1965.

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