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Another day of southerlies forecast – almost a record

News from MetService
Looking towards Monday, a trough currently sitting over Fiordland is expected to slowly push eastward to affect the lower South Island and Far North. Southerlies are expected to persist over Wellington, which would make Monday the sixth day straight for the Capital – not far off the record of ten seen in May 1978.

Strong winds and isolated showers today are all that remains of the low which brought prolonged rain and strong southerlies to the east of the North Island and upper South Island over the past week. This low brought a dose of rain and cold southerlies to the whole of the country during Monday and Tuesday. As the weather began to ease over the South Island from Tuesday, the northeast of the North Island entered into a prolonged period of heavy rain and strong southerlies.

The southerly change which brought 96km/h gusts and rain to Wellington suburbs moved onto the Hawkes Bay and Gisborne regions late Monday and lingered there as they became sandwiched between a slow moving ridge of high pressure to the south and the low to the east. Not until the weekend did the Severe Weather Watches lift.

“As a result of the prolonged rain, accumulations have reached well into the double digits for the Hawkes Bay and Gisborne regions with 444.5mm recorded over the Huiarua ranges from midday Tuesday to midday Saturday,” April Clark MetService Meteorologist reported. “Away from the ranges, Napier has received 106.8mm in the same period meaning it has received double its September average within the first third of the month” she added.

State highway 5 and 2 were closed for a time due to flooding and slips, leaving the main passes between eastern and central North Island impassable.

Though southerlies and scattered showers persisted over the east of the North Island into Saturday the rest of the country enjoyed settled and generally fine weather this weekend.

News from MetService – 6 Septenber
After a week of wild weather across central New Zealand courtesy of a slow-moving trough, which saw nearly 290mm of rain fall in inland Hawke’s Bay over the last two and a half days, a respite is in store this weekend as the offending trough moves east.

The trough continues to bring showers or rain to the North Island and northern South Island today and tomorrow, with the heaviest falls concentrated over Hawke’s Bay and Gisborne. A Heavy Rain Warning is in force for Hawke’s Bay, where a further 150 to 180mm of rain is expected in the ranges north of Napier, and 70 to 100mm elsewhere, through until mid-afternoon Friday. Peak intensities of 10 to 15mm per hour are expected, especially about the ranges.

There is also a Heavy Rain Watch for Gisborne south of Tokomaru Bay, and Strong Wind Watches for the possibility of severe southeast gales in Wellington south of the Ngauranga Gorge and also Bay of Plenty, Taupo, Rotorua, Gisborne south of Tokomaru Bay, Hawke’s Bay, and Taranaki. Heavy southeast swells of 4m or more are forecast to affect coastal Wairarapa, Hawke’s Bay and Gisborne today, tomorrow and again on Monday and Tuesday. Meanwhile, the South Island experiences mostly fine weather due to a ridge of high pressure.

“On Saturday the trough over central New Zealand moves east of the country, while the ridge persists over the South Island,” says MetService Meteorologist Ciaran Doolin. “Rain eases to occasional showers on the east coast of the North Island, while the rest of the country should see mostly fine weather. Temperatures will remain cool, however, as a southerly air flow continues to affect the North Island. That’s good news for rugby fans, as the weather is looking great for the All Blacks vs. Argentina in Nelson on Saturday evening.”

A front moves up the South Island on Sunday and onto the North Island on Monday, as another front moves up the South Island. The fronts clear the country overnight Monday, followed by a weak ridge on Tuesday bringing fine weather across the country.

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