Valid to: 9:00am Saturday 21 May 2016
Issued at: 6:32pm Friday 20 May 2016

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An active front is expected to move northeast over much of cental and northern New Zealand Friday evening and overnight. There is a high risk of thunderstorms ahead of and with this front for western areas from the Marlborough sounds and Kapiti to Northland, including Auckland in the overnight hours.

A few of these thunderstorms may be SEVERE bringing damaging wind squalls in excess of 110km/h and possibly one or two damaging tornados to the following areas... 

Northern Marlborough Sounds, Kapiti Coast, Horowhenua and Taranaki: During Friday evening.

Waitomo, Taumaranui and Waikato: Friday evening. 

Auckland, Northland, Coromandel and Bay of Plenty: Overnight Friday to before dawn Saturday 

These squally winds and possible tornados may cause some structural damage, including damage to trees and power lines, and make driving hazardous. If any tornados occur, they will only affect very localised areas.

Note: A Severe Thunderstorm Watch means conditions are favourable for severe thunderstorms in and close to the watch area. People in these areas should be on the lookout for threatening weather conditions and monitor for possible Severe Thunderstorm Warnings. 

Note: A Severe Thunderstorm Watch means conditions are favourable for severe thunderstorms in and close to the watch area. People in these areas should be on the lookout for threatening weather conditions and monitor for possible Severe Thunderstorm Warnings. 

Issued by: Hordur Thordarso

This watch will be updated by: 08:30 am Saturday 21 May 2016

 


Issued by MetService Friday 20 May 2016
Valid until 05:00 am Saturday 21 May 2016

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An active front is expected to move northeast over much of cental and northern New Zealand today and overnight tonight. There is a high risk of thunderstorms ahead of and with this front for western areas from central Westland to Northland, including Auckland in the overnight hours.

A few of these thunderstorms may be SEVERE bringing damaging wind squalls in excess of 110km/h and possibly one or two damaging tornados to the following areas...

Central Westland: Friday morning.

Buller and northwest Nelson: Friday morning until mid-afternoon.

Northern Marlborough Sounds: During Friday afternoon.

Kapiti Coast, Horowhenua and Taranaki: During Friday afternoon and evening.

Waitomo, Taumaranui and Waikato: From late Friday afternoon and into the evening.

Auckland, Northland, Coromandel and Bay of Plenty: Overnight Friday to before dawn Saturday

These squally winds and possible tornados may cause some structural damage, including damage to trees and power lines, and make driving hazardous. If any tornados occur, they will only affect very localised areas.

Note: A Severe Thunderstorm Watch means conditions are favourable for severe thunderstorms in and close to the watch area. People in these areas should be on the lookout for threatening weather conditions and monitor for possible Severe Thunderstorm Warnings.

Issued by: gullery

This watch will be updated by: 10:00 pm Friday 20 May 2016

 


Issued by MetService  Wednesday 18 May 2016
Valid until 07:30 pm Wednesday 18 May 2016

A very active front should move quickly across New Zealand during Wednesday and is expected to bring a period of thunderstorms to many areas.

There is a moderate risk that these thunderstorms could become SEVERE with strong wind gusts of greater than 110km/hr and may also be accompanied by damaging tornadoes.

The SEVERE THUNDERSTORMS are expected in the following areas.. 

Buller and northwest Nelson, Marlborough Sounds, Taranaki, Northern Wellington, Kapiti, Horowhenua Kapiti, Manawatu, Whanganui, Taihape, Taumarunui, Waitomo and Waikato: Until mid afternoon Wednesday

Auckland, Northland, Coromandel Peninsula, Rotorua, Bay of Plenty and northern Gisborne: From around midday Wednesday to late afternoon.

Wind gusts greater than 110 km/hr can cause some structural damage, including trees and power lines, and may make driving hazardous. If any tornados occur, they will only affect very localised areas. 

Note: A Severe Thunderstorm Watch means conditions are favourable for severe thunderstorms in and close to the watch area. People in these areas should be on the lookout for threatening weather conditions and monitor for possible Severe Thunderstorm Warnings.

Issued by: Hordur Thordarson

This watch will be updated by: 07:00 pm Wednesday 18 May 2016

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A very active front should move quickly across New Zealand during Wednesday and is expected to bring a period of thunderstorms to many areas.

There is a moderate risk that these thunderstorms could become SEVERE with strong wind gusts of greater than 110km/hr and may also be accompanied by damaging tornadoes.

The SEVERE THUNDERSTORMS are expected in the following areas...

Westland from Hokitika northwards, Buller and northwest Nelson: From just before dawn Wednesday until late morning.

The Marlborough Sounds and Taranaki: From just after dawn until midday Wednesday.

Northern Wellington, Kapiti, Horowhenua, Manawatu, Whanganui, Taihape, Taumarunui, Waitomo and Waikato: From mid-morning until early afternoon Wednesday

Auckland, Northland, Coromandel Peninsula, Rotorua, Bay of Plenty and northern Gisborne: From midday Wednesday until mid to late afternoon.

Wind gusts greater than 110 km/hr can cause some structural damage, including trees and power lines, and may make driving hazardous. If any tornados occur, they will only affect very localised areas.

Note: A Severe Thunderstorm Watch means conditions are favourable for severe thunderstorms in and close to the watch area. People in these areas should be on the lookout for threatening weather conditions and monitor for possible Severe Thunderstorm Warnings.

Issued by: Allister Gorman

This watch will be updated by: 09:30 am Wednesday 18 May 2016

 


Issued by MetService Thursday 24 March 2016
Valid until 05:00 pm Thursday 24 March 2016

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This watch affects people in the following weather forecast districts:
Great Barrier Island
Coromandel Peninsula
Bay of Plenty
Rotorua
Gisborne
Taranaki

 

A band of heavy rain with a few thunderstorms is forecast to move across Taranaki in the next few hours and move away to the east by about 8am. This same band is expected to move across Great Barrier Island and onto the Coromandel Peninsula and western Bay of Plenty around this time (8am) and then move east across Bay of Plenty during the day to reach northern Gisborne early this afternoon and then move away to the east by late afternoon. (A Warning or Watch for widespread heavy rain has been issued for these areas).

 

This WATCH is for the possibility that a few thunderstorms may become SEVERE in these areas today. These SEVERE thunderstorms could produce localised downpours of 25 to 40mm per hour or possibly more. Rainfall of this intensity can cause surface and/or flash flooding as well as slips and hazardous driving conditions.

 

Note: A Severe Thunderstorm Watch means conditions are favourable for severe thunderstorms in and close to the watch area. People in these areas should be on the lookout for threatening weather conditions and listen for possible Severe Thunderstorm Warnings.

 

Issued by: Paul Mallinson

 

This watch will be updated by: 11:00 am Thursday 24 March 2016

 

 


SEVERE THUNDERSTORM WATCH

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Issued by MetService Wednesday 23 March 2016
Valid until 03:00 pm Thursday 24 March 2016
This watch affects people in the following weather forecast districts:
Northland
Auckland
Great Barrier Island
Coromandel Peninsula
Waikato
Waitomo
Bay of Plenty
Rotorua
Gisborne
Taranaki

A band of heavy rain and thunderstorms are forecast to move onto Northland tonight and spread down to Auckland and northern Taranaki early Thursday morning, then into Waikato, Waitomo, Coromandel Peninsula, Bay of Plenty, Rotorua and the ranges of Gisborne during the remainder of Thursday morning and afternoon (a Warning or Watch for widespread heavy rain has been issued for these areas). Thunderstorms are expected to ease in Northland before dawn, and through Auckland, Waikato, Waitomo and northern Taranaki towards midday Thursday.

This WATCH is for the possibility of SEVERE thunderstorms for these areas during this time. These SEVERE thunderstorms could produce localised downpours of 25 to 40mm per hour or possibly more. Rainfall of this intensity can cause surface and/or flash flooding as well as slips and hazardous driving conditions.

Note: A Severe Thunderstorm Watch means conditions are favourable for severe thunderstorms in and close to the watch area. People in these areas should be on the lookout for threatening weather conditions and listen for possible Severe Thunderstorm Warnings.

Issued by: Sarah Garlick

This watch will be updated by: 06:00 am Thursday 24 March 2016

 

 


Issued by MetService at 03:37 pm Wednesday 16 March 2016
Valid until 09:00 pm Wednesday 16 March 2016
This watch affects people in the following weather forecast districts:
Waikato
Bay of Plenty
Rotorua

Scattered heavy showers and a few thunderstorms have developed over eastern Bay of Plenty and Rotorua this afternoon and these are expected to spread through the remainder of Bay of Plenty and into eastern Waikato in the late afternoon and evening.

About Bay of Plenty west of Whakatane, Rotorua, and eastern Waikato (mainly near the Kaimai and Mamaku ranges) there is a risk of a few severe thunderstorms producing localised downpours of 25-35mm/hr through to about 9pm today (Wednesday).

Rainfall of this intensity can cause flash flooding, especially about low-lying areas such as streams, rivers or narrow valleys, and may also lead to slips. Driving conditions will also be hazardous with surface flooding and poor visibility in heavy rain.

Note: A Severe Thunderstorm Watch means conditions are favourable for severe thunderstorms in and close to the watch area. People in these areas should be on the lookout for threatening weather conditions and listen for possible Severe Thunderstorm Warnings.

Issued by: John Crouch

This watch will be updated by: 09:00 pm Wednesday 16 March 2016

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Valid to: Midnight Monday 29 Feb 2016

Issued at: 8:58am Monday 29 Feb 2016

A front is moving slowly across central and upper parts of the North Island today, preceded by humid northwesterlies and rain. There is a low risk of a few thunderstorms from Waitomo to Northland, including Taupo, Bay of Plenty and Gisborne. This risk gradually eases from the south. Note, the front may become slow moving for a time this afternoon and early evening across Waikato and Bay of Plenty, also Auckland and the Coromandel Peninsula. In these areas there is a low risk of localised downpours of 25 to 40mm/hr.

No thunderstorms expected over the remainder of New Zealand.

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Valid to: Midnight Monday 18 Jan 2016

Issued at: 8:43am Monday 18 Jan 2016

A slow moving front should move onto the west of the North Island and the northwest of the South Island bringing bands of heavy northerly rain, for which WARNINGS and WATCHES and now in effect. This afternoon, day-time heating is expected to trigger widespread shower activity over the North Island ahead of the arrival of the frontal rain this evening.

There is a moderate risk of thunderstorms over the northwestern half of the North Island and over southern parts of Hawkes Bay south to Wairarapa and over the upper South Island as indicated on the chart. Rainfall rates of 10-25mm/hr are generally possible, however, over much of Nelson, northwest Marlborough,Taranaki and Waitomo, there is at least a moderate risk of downpours in the 25-40mm/hr range as the frontal rainband progresses east through the period.Rainfalls of this intensity may occur for several hours and have the potential to generate problems such as flooding and erosion.

From late afternoon there is also a high risk of thunderstorms with the rainband as it moves eastwards, for northwest Nelson and from Taranaki to western Coromandel Peninsula northwards. Rainfall rates up to 25mm/hr or so can be expected. When the front makes landfall over Taranaki late at night, there is slight risk of a small coastal tornado.

Elsewhere over the North Island there is a low risk of thunderstorms as depicted on the chart.

Elsewhere, no thunderstorms or significant convection expected.

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SEVERE THUNDERSTORM WATCH

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Issued by MetService at 09:44 pm Thursday 07 January 2016
Valid until 06:00 pm Friday 08 January 2016
This watch affects people in the following weather forecast districts:
Northland
Auckland
Great Barrier Island
Coromandel Peninsula
Waikato
Waitomo
Taumarunui
Bay of Plenty
Rotorua
Taupo
Taranaki
Nelson
Buller
Westland

A front is expected to move onto the northwest of the South Island in the early hours of Friday morning, onto the west of the North Island from about dawn and then cross the upper North Island (north of a line from Taranaki to East Cape) during the afternoon. There is a high risk of thunderstorms moving through these areas from west to east during the period with locaised rainfall rates generally expected in the 10 to 25mm/hr range. However, there is a moderate risk that some of these thunderstorms may become SEVERE with localised downpours of 25 to 45mm/hr possible.

Such rainfall rates may last one to two hours and have the potential to cause flash flooding, especially about low-lying areas such as streams, rivers or narrow valleys, and may also lead to slips. Driving conditions will also be hazardous with surface flooding and poor visibility in heavy rain. More specifically, higher population areas such as Auckland city and Hamilton city can expected this threat to move through during the afternoon hours.

Note: A Severe Thunderstorm Watch means conditions are favourable for severe thunderstorms in and close to the watch area. People in these areas should be on the lookout for threatening weather conditions and listen for possible Severe Thunderstorm Warnings.

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