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Weather Warning


SEVERE WEATHER WARNING.
ISSUED BY MetService AT 9:04am 24-Jul-2016
URGENT - IMMEDIATE BROADCAST IN: Westland, Buller, Nelson, Wairarapa,
Wellington, Marlborough, Chatham Islands, Northland, Auckland, Great
Barrier Island, Waikato, Waitomo, Coromandel Peninsula, Bay Of
Plenty, Rotorua, Gisborne, Taihape, Taranaki, Wanganui, Manawatu,
Kapiti Horowhenua, Tararua, Canterbury High Country

HEAVY RAIN IN THE WEST OF THE SOUTH ISLAND EASING THIS AFTERNOON OR
EVENING. SEVERE NORTHWEST GALES ABOUT CENTRAL NEW ZEALAND EASING BUT
CONTINUING ABOUT CHATHAM ISLANDS UNTIL MONDAY MORNING.
An active front that passed over New Zealand has left a strong west
to northwest airflow over much of the country including the Chatham
Islands.
Heavy rain has been falling in the the west and north of the South
Island, but is expected to turn to showers today with squally
thunderstorms. A rainfall warning remains in Westland, Buller and
western Nelson until this afternoon or evening.
People in these areas are advised that this amount of rain will cause
rivers and streams to rise rapidly and may cause slips and surface
flooding.
Although the wind has eased slightly in many places, a warning for
severe gale northwesterlies remains for Wellington, Wairarapa, the
Marlborough Sounds and Chatham Islands.
These winds have the potential to be damaging, particularly to trees,
powerlines and unsecured structures and also make for hazardous
driving conditions, especially for tall sided vehicles and
motorcycles.
Also, heavy swells and large waves are expected to affect western
coasts and may cause coastal erosion in vulnerable areas and make
driving conditions hazardous about low-lying coastal roads.
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FOLLOWS.
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HEAVY RAIN WARNING
______________________
AREA/S AFFECTED: WESTLAND
FORECAST:
Heavy rain is expected to continue through to this evening. In the 12
hours from 9am to 9pm Sunday expect a further 50 to 70mm of rain to
accumulate in the ranges. During the same period 30mm is possible
near the coast. Peak intensities of 25 mm per hour are still possible
associated with thunderstorms.
FREEZING LEVEL: Lowering to 1000 metres this morning.
AREA/S AFFECTED: BULLER
FORECAST:
Heavy rain is expected to continue through to this afternoon. In the
6 hours from 9am to 3pm Sunday, expect a further 40 to 50mm of rain
to accumulate about the ranges and 20mm near the coast. Peak
intensities of 25mm per hour are still possible associated with
thunderstorms.
FREEZING LEVEL: Lowering to 1200 metres this morning.
AREA/S AFFECTED: THE RANGES OF NELSON WEST OF MOTUEKA
FORECAST:
Heavy rain is expected to continue through to this afternoon. In the
6 hours from 9am to 3pm Sunday expect a further 40 to 50mm of rain.
Peak intensities of 25 mm per hour are possible with thunderstorms.
FREEZING LEVEL: About 2600 metres, lowering to 1400 metres this
morning.
_______________________
STRONG WIND WARNING
_______________________
AREA/S AFFECTED: WAIRARAPA, WELLINGTON AND THE MARLBOROUGH SOUNDS
FORECAST:
Until early Sunday afternoon, severe gale northwesterlies gusting 130
km/h, or possibly stronger, are expected. Note, later in the
afternoon and through to Monday morning, westerly gales are expected
to continue in northern Wellington and Wairarapa and gusts may come
close to exceeding warning criteria of 120 km/h.
AREA/S AFFECTED: CHATHAM ISLANDS
FORECAST:
Northwesterlies are expected to strengthen today. From early
afternoon Sunday until about dawn Monday morning winds may reach
severe gale at times with gusts of 120 km/h.
_______________________________
WARNINGS NO LONGER IN FORCE
_______________________________
HEAVY RAIN WARNINGS HAVE BEEN LIFTED FOR: TARARUA RANGE
Some heavy showers are likely during Sunday and early Monday but the
threat of widespread heavy rain has passed.
HEAVY RAIN WARNINGS HAVE BEEN LIFTED FOR: RICHMOND AND BRYANT RANGES
HEAVY RAIN WARNINGS HAVE BEEN LIFTED FOR: HEADWATERS OF THE
CANTERBURY LAKES AND RIVERS
Heavy showers and thunderstorms are still possible near the divide,
but the threat of widespread heavy rain has passed.
STRONG WIND WARNINGS HAVE BEEN LIFTED FOR: NORTHLAND, AUCKLAND,
COROMANDEL PENINSULA, WAIKATO, WAITOMO, BAY OF PLENTY AND GISBORNE
STRONG WIND WARNINGS HAVE BEEN LIFTED FOR: TARANAKI, TAIHAPE,
WANGANUI, MANAWATU, HOROWHENUA AND KAPITI COAST
Strong to gale westerly winds continue during Sunday, but the
likelihood of severe gales has reduced and although the Warning is
lifted a Watch will be maintained for some of these areas.
NEXT SEVERE WEATHER WARNING WILL BE ISSUED AT OR BEFORE
9:00pm Sunday 24-Jul-2016
Forecast prepared by: Allister Gorman
A service provided through a contract with the Crown

Short Range Forecast

201607252359

WARNINGS ARE IN FORCE FOR SEVERE GALES AND HEAVY RAIN IN MANY AREAS.
Northland to Kapiti, also Coromandel Peninsula, Bay of Plenty, central high country, and Wairarapa: Occasional showers, some heavy, clearing overnight in Bay of Plenty and Wairarapa, and gradually clearing everywhere else tomorrow. Westerly gales, possible severe in the south, easing tomorrow.
Gisborne and Hawkes Bay: Mainly fine, but the odd shower today.
Wellington, Marlborough and Canterbury: Showers inland today. Fine about Wellington and the coast and everywhere tomorrow. Severe northwest gales, easing tomorrow.
Nelson: Showers today. Fine tomorrow.
Buller to Fiordland: Periods of rain today, heavy at times with squally thunderstorms and snow to 500, rising this evening. Showers tomorrow, gradually easing.
Southland and Otago: Periods of rain, with to snow 100 metres in Southland and 300 metres in Otago at times. Rain easing to showers tomorrow morning and retreating to the south coast.
Chatham Islands: Showers developing this evening. Northwest gales, severe for a time.

Extended Forecast

201607282359

Tuesday: North Island, a period of rain, with some heavy falls in the west, then a few showers in the west and dry in the east. South Island, mainly fine in the east with morning frosts, possibly severe, but morning rain for the Sounds and Golden Bay. Cloud increasing in the west, with rain or drizzle developing.
Wednesday: North Island, occasional showers in the west, and mainly fine in the east. South Island, periods of rain in the west, with heavy falls possible, and a few spots of rain in the east.
Thursday: North Island, rain for most places, with heavy falls and possible thunderstorms in the west. South Island, rain in the west, with heavy falls possible. A few showers in the east.
Chatham Islands: Occasional showers on Tuesday and Wednesday, and strong southwesterlies easing and turning northwesterly. Rain at times on Thursday with strong westerlies.

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