SEVERE WEATHER WARNING.
ISSUED BY MetService AT 9:27am 01-Jul-2015
URGENT - IMMEDIATE BROADCAST IN: Westland, Otago, Canterbury
BURST OF HEAVY RAIN FOR WESTLAND AND THE ALPS THURSDAY TO FRIDAY,
WITH NORTHWEST GALES ABOUT INLAND CANTERBURY.
A complex trough is expected to move east over the country during
Thursday, Friday and early Saturday. This trough is expected to bring
rain to western areas, with the heaviest falls expected about the
South Westland Ranges and the Otago and Canterbury Headwaters. In
these areas 80 to 120mm is likely to accumulate over a 15 to 18 hour
period, with 150 to 200mm about higher parts of the Alps.
Heavy rain is likely to cause rivers and streams to rise, and make
In addition, northwest gales about inland parts of the South Island
are expected to rise to severe gale about inland Canterbury, gusting
130km/h in exposed places.
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: WESTLAND RANGES ABOUT AND SOUTH OF OTIRA
Heavy rain is expected from Thursday afternoon, clearing Friday
morning. In the 18 hours from 2pm Thursday until 8am Friday expect 80
to 120mm to accumulate, with 150 to 200mm about higher parts of the
Alps. Peak intensities 20 to 30mm per hour Thursday night and early
Friday morning with thunderstorms possible. Note: 50 to 70mm is
likely near the coast during the same period.
FREEZING LEVEL: 1600 metres, lowering to 1400 metres in heavy rain.
AREA/S AFFECTED: THE OTAGO AND CANTERBURY HEADWATERS
A period of heavy rain is expected from Thursday afternoon to early
Friday. In the 15 hours from midday Thursday about Otago, but 3pm
Thursday about Canterbury, expect 80 to 120mm to accumulate within
20km of the divide, but 150 to 200mm about the divide between Lake
Ohau and Arthurs Pass. Peak intensities 20 to 30mm per hour about the
divide Thursday night and early Friday morning with thunderstorms
FREEZING LEVEL: About 1800 metres, lowering to 1600 metres in heavy
STRONG WIND WARNING
AREA/S AFFECTED: INLAND CANTERBURY
Northwesterlies are expected to rise to gale late Thursday afternoon,
then to severe gale Thursday night, gusting 130km/h in exposed
places, especially north of Lake Tekapo. Northwesterlies are expected
to ease Friday morning.
NEXT SEVERE WEATHER WARNING WILL BE ISSUED AT OR BEFORE
9:00pm Wednesday 01-Jul-2015
Forecast prepared by: Leigh Matheson
For further information after 2pm Wednesday 1 July contact Duty
Forecaster Rochelle Fleming
A service provided through a contract with the Crown
Short Range Forecast
From Northland to Manawatu and Bay of Plenty to Wairarapa including the central high country: Mainly fine, apart from areas of morning cloud and the odd shower in Taranaki. Isolated showers developing about eastern Northland this evening.
Kapiti and Wellington: Fine at first, but becoming cloudier this morning with the odd shower possible.
Nelson, Marlborough and Canterbury: Fine with increasing high cloud.
Buller: A few showers turning to rain tonight.
Westland and Fiordland: A few showers turning to rain in Fiordland this morning and in Westland in the afternoon, with some heavy and possibly thundery falls.
Southland and Otago: Fine at first. High cloud developing from afternoon and scattered rain developing in Southland and Clutha tonight.
Chatham Islands: A few morning and evening showers, otherwise fine.
Friday: North Island, Rain spreading to most places, with heavy falls in western areas. South Island, rain, with heavy falls in the north and west, clearing, but easing to showers in the south. Snow to 600 metres in Fiordland.
Saturday: North Island, rain or showers in most places, with heavy falls in Bay of Plenty. South Island, Rain or showers in the west and south, fine with high cloud elsewhere.
Sunday: North Island, showers easing in the north, rain or showers clearing elsewhere. South Island, rain or showers in the west and far south, few spots of rain in the east, and fine in the north.
Chatham Islands: Strong northwesterlies on Friday with rain developing later. Rain on Saturday, and northwesterlies possibly rising to gale.Rain easing on Sunday, and winds turning strong westerly.