SEVERE WEATHER WARNING.
ISSUED BY MetService AT 8:59am 04-Aug-2015
URGENT - IMMEDIATE BROADCAST IN: Westland, Buller, Nelson, Wairarapa,
Wellington, Taranaki, Bay Of Plenty Rotorua, Marlborough
HEAVY RAIN FOR THE NORTHWEST OF THE SOUTH ISLAND, THE TARARUA RANGE
AND MOUNT TARANAKI EASING THIS AFTERNOON OR EARLY EVENING. HEAVY RAIN
DEVELOPING IN EASTERN BAY OF PLENTY TONIGHT. SEVERE NORTHERLY GALES
FOR WELLINGTON AND SOUTH WAIRARAPA UNTIL THIS EVENING.
Unsettled weather is expected over New Zealand for the coming week,
with a series of troughs moving across the country. Fronts over the
South Island are starting to move north this morning but are expected
to become slow-moving over eastern Bay of Plenty tonight.
Heavy rain that is affecting the northwest of the South Island, the
Tararua Range and Mount Taranaki should ease this afternoon or early
evening. In the South Island, a further 30 to 50mm of rain could
accumulate on top of what has already fallen. For the Tararua Range
and Mount Taranaki, another 60 to 80mm is possible before conditions
As the front stalls over eastern Bay of Plenty, the ranges east of
Whakatane can expect 90 to 120mm of rain from this evening until
People are advised that streams and rivers are likely to rise
rapidly, with surface flooding and slips possible. Note, further
periods of heavy rain are forecast for Buller and Westland for the
rest of the week, although accumulations are expected to be
significantly less than in this event.
In addition, severe northerly gales affecting Wellington and South
Wairarapa aren't expected to ease until this evening. Gusts of 140
km/h are possible for a time late this morning or early afternoon.
Winds of this strength have the potential to damage trees, powerlines
and unsecured structures, and make driving hazardous for high-sided
vehicles and motorcycles.
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HEAVY RAIN WARNING
AREA/S AFFECTED: WESTLAND FROM FOX GLACIER NORTHWARDS
Some further bursts of heavy rain with possible thunderstorms are
expected until this afternoon. In the 5 hours from 9am to 2pm
Tuesday, another 30 to 50mm is possible about the ranges north of
Harihari. Peak intensities of 10 to 20mm per hour.
FREEZING LEVEL: 2200 metres.
AREA/S AFFECTED: BULLER, INCLUDING THE PAPAROA RANGE
Periods of heavy rain are likely to continue until early afternoon.
In the 5 hours between 9am and 2pm Tuesday expect a further 30 to
50mm of rain to accumulate about the ranges. Peak intensities of 15
to 20mm per hour are possible.
FREEZING LEVEL: 2300 metres.
AREA/S AFFECTED: WESTERN NELSON, INCLUDING NELSON LAKES NATIONAL PARK
Northwesterly rain is expected to ease early this afternoon. In the 5
hours from 9am to 2pm Tuesday, expect a further 30 to 50mm to
accumulate about the ranges of northwest Nelson, and a futher 20 to
40mm about Nelson Lakes. These amounts are on top of what has already
fallen. Peak intensities could reach 10 to 15mm per hour this
FREEZING LEVEL: About 2500 metres.
AREA/S AFFECTED: THE TARARUA RANGE
Heavy rain is expected to ease late this afternoon. In the 9 hours
from 9am until 6pm Tuesday, a further 60 to 80mm of rain is possible
in addition to what has already fallen. Rainfall intensities of 10 to
20mm per hour are possible until early afternoon.
AREA/S AFFECTED: MT TARANAKI
Heavy rain is likely to ease late this afternoon. In the 9 hours
between 9am and 6pm Tuesday, expect a further 60 to 80mm to
accumulate on top of what has already fallen. Peak intensities of 10
to 20mm per hour are possible this afternoon.
AREA/S AFFECTED: BAY OF PLENTY RANGES EAST OF WHAKATANE
Heavy rain is expected to develop in the ranges this evening and
continue until Wednesday afternoon. In the 18 hours between 9pm
Tuesday and 3pm Wednesday, 90 to 120mm of rain may fall. Rainfall
intensities could reach 15mm per hour during Wednesday morning.
Further heavy rain is likely during Thursday.
STRONG WIND WARNING
AREA/S AFFECTED: WELLINGTON, WAIRARAPA SOUTH OF GREYTOWN
Severe north to northwest gales, gusting 120 km/h in exposed places,
are expected to ease this evening. Winds are likely to peak late
morning and early afternoon, when gusts of 140 km/h are possible.
NEXT SEVERE WEATHER WARNING WILL BE ISSUED AT OR BEFORE
9:00pm Tuesday 04-Aug-2015
Forecast prepared by: Allister Gorman
A service provided through a contract with the Crown
Short Range Forecast
Northland, Auckland, Coromandel and Bay of Plenty: Rain with some heavy falls developing this evening.
Waikato to Wellington and Wairarapa, including the central high country: Rain, with some heavy falls, clearing from the south this evening. Rain returning to Waikato in the morning and elsewhere later.
Gisborne and Hawkes Bay: Occasional rain.
Marlborough and Nelson: Becoming fine this evening.
Canterbury, Otago and Southland: Showers clearing and becoming fine overnight.
Buller and Westland: Showers this evening, then cloudy periods but some isolated showers in the south of Westland.
Fiordland: Showers, mainly about the fiords.
Chatham Islands: Cloudy, with rain tonight.
Thursday: North Island, rain with heavy falls in the north and west,easing. A period of rain for southern and eastern areas. South Island, rain in the west spreading northwards, with heavy, thundery falls. Fine in the east, late showers in the south.
Friday: North Island, showers in the west, turning to rain for a time with heavy falls. Rain developing in the east from afternoon. South Island, showers in the west, some heavy and thundery. High cloud in the east, and a few showers in the south.
Saturday: North Island, occasional rain, clearing in the east, heavy falls in the west easing. Late showers in the south. South Island, showers, snow to low levels, gradually easing in the north and west.
Chatham Islands: Rain with heavy falls developing Thursday and northerlies rising to gale, easing to showers Friday with northerlies easing slightly. Rain returning Saturday, and northerlies rising to gale.