SEVERE WEATHER WARNING.
ISSUED BY MetService AT 9:13am 02-Jul-2015
URGENT - IMMEDIATE BROADCAST IN: Fiordland, Otago, Westland,
Canterbury, Buller, Wairarapa, Wellington
BURST OF HEAVY RAIN FOR THE WEST OF THE SOUTH ISLAND AND THE OTAGO
AND CANTERBURY HEADWATERS. SEVERE GALES ABOUT INLAND CANTERBURY,
WELLINGTON AND WAIRARAPA.
A complex trough with embedded fronts is expected to move northeast
over the South Island today and during Friday morning and onto the
North Island Friday afternoon. This feature is expected to bring a
burst of heavy rain to the west of the South Island and significant
spillover into the headwaters of the Otago and Canterbury lakes and
rivers. Heavy rain may cause rivers and streams to rise rapidly,
slips and surface flooding.
The trough is preceded by strong northwesterlies and severe gales are
expected about inland Canterbury, Wellington and Wairarapa. Winds of
this strength can bring down trees and powerlines, and make driving
hazardous for high-sided vehicles and motorcycles.
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HEAVY RAIN WARNING
AREA/S AFFECTED: FIORDLAND NORTH OF DOUBTFUL SOUND
Rain is expected to become heavy around noon today. In the 12 hours
from noon to midnight expect 80 to 100mm of rain. Peak intensities of
10 to 20mm per hour this afternoon and again late this evening when
thunderstorms are possible.
FREEZING LEVEL: About 1700 metres.
AREA/S AFFECTED: THE HEADWATERS OF THE OTAGO LAKES AND RIVERS
A period of heavy rain is expected from Thursday afternoon to early
Friday morning. In the 15 hours from 1pm Thursday to 4am Friday,
expect 80 to 100mm to accumulate within 20km east of the divide. Peak
intensities 15 to 20mm per hour about the divide Thursday evening to
early Friday morning with thunderstorms possible.
FREEZING LEVEL: 1600 metres, lowering to 1200 metres early Friday
AREA/S AFFECTED: WESTLAND RANGES ABOUT AND SOUTH OF OTIRA
Rain is expected to become heavy this afternoon but ease Friday
morning. In the 22 hours from noon today to 10am Friday expect 180 to
250mm about higher parts of the Alps but 70 to 100 mm near the coast.
Peak intensities of 20 to 30mm per hour Thursday evening to early
Friday morning with thunderstorms possible.
FREEZING LEVEL: About 1800 metres, lowering to 1400 metres Friday
AREA/S AFFECTED: THE HEADWATERS OF THE CANTERBURY LAKES AND RIVERS
SOUTH OF ARTHURS PASS
A period of heavy rain is expected from Thursday afternoon to Friday
morning. In the 18 hours from 3pm Thursday to 9am Friday, expect 150
to 200mm near the divide and 80 to 120mm with 20km east of the
divide. Peak intensities 20 to 30mm per hour about the divide
Thursday evening to early Friday morning with thunderstorms possible.
FREEZING LEVEL: 1700 metres, lowering to 1400 metres early Friday
AREA/S AFFECTED: WESTLAND NORTH OF OTIRA AND BULLER SOUTH OF THE
Rain is expected to become heavy about the ranges this evening but
ease around noon Friday. In the 12 hours from midnight tonight to
noon Friday expect 70 to 100mm to accumulate about the ranges and
lesser amounts near the coast. The heaviest rain is likely to affect
the Paparoa Range.
FREEZING LEVEL: About 1800 metres, lowering to 1500 metres Friday
STRONG WIND WARNING
AREA/S AFFECTED: INLAND CANTERBURY
Northwesterlies are expected to rise severe gale late this afternoon,
gusting 130km/h in exposed places, especially north of Lake Tekapo.
Northwesterlies are expected to ease Friday morning.
AREA/S AFFECTED: WELLINGTON AND WAIRARAPA
Northwesterlies are expected to rise to severe gale gusting 130 km/h
in exposed places Friday afternoon. The severe gale is expected to
ease early Friday evening.
NEXT SEVERE WEATHER WARNING WILL BE ISSUED AT OR BEFORE
9:00pm Thursday 02-Jul-2015
Forecast prepared by: Hordur Thordarson
For further information after 2pm contact Duty Forecaster Leigh
A service provided through a contract with the Crown
Short Range Forecast
From Northland to Taranaki and Bay of Plenty, including the central high country: Mainly fine today. Rain developing from the west tomorrow afternoon, brief heavy about the mountains.
Wanganui to Wellington, also Wairarapa: Cloudy periods. A few showers from Horowhenua to Wellington tomorrow morning, turning to widespread rain tomorrow afternoon, easing at night. Severe northwesterly gales possible in Wellington and Wairarapa tomorrow afternoon.
Gisborne, Hawkes Bay: Mostly fine. Scattered rain later tomorrow.
Nelson, Marlborough, Canterbury: Mostly fine, but heavy rain about the Alps developing this afternoon. Scattered rain spreading elsewhere tomorrow, some heavy in Nelson, clearing from the south later.
Buller: A few showers turning to rain overnight, some heavy, clearing tomorrow evening.
Westland, Fiordland: Rain with some heavy falls, clearing tomorrow, but a few sleety showers lingering in Fiordland.
Southland and Otago: Fine at first. Scattered rain developing overnight, clearing late tomorrow.
Chatham Islands: Mainly fine. A few showers overnight and late tomorrow.
Saturday: North Island, rain in the north, with heavy falls in Bay of Plenty, a few showers elsewhere. South Island, rain or showers in the west and south, with heavy falls in Fiordland, fine with high cloud elsewhere.
Sunday: North Island, a few showers in the north and west, fine spells in the south and rain clearing in the east. South Island, rain or showers in the west and far south, few spots of rain in the east, and fine in the north.
Monday: North Island, a few showers in the north and west, mainly fine elsewhere. South Island, rain or showers in the west and far south, with heavy falls in Fiordland, mainly fine elsewhere.
Chatham Islands: Rain at times on Saturday, and northerlies developing. Rain on Sunday, and winds turning strong westerly.Occasional showers and strong westerlies on Monday.