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Wednesday's national forecast

Posted by WW Forecast Team on Wed, 30/05/2018 - 04:05

An anticyclone lies over most of New Zealand today bringing mainly settled and frosty weather, just a few showers for the North Island's east coast.

Northland, Auckland, Waikato & Bay Of Plenty
Sunny with light southerly winds.
Highs: 14-15

Western North Island (including Central North Island)
A mix of sun and cloud with light winds.
Highs: 8-13

Eastern North Island
A few coastal showers (right on the coast), easing during the day and clearing in the evening. These showers are more likely to affect northern Hawkes Bay / Gisborne the most. Mainly dry elsewhere with morning cloud breaking to sunny areas which gradually increase during the day. Winds cool from the southwest.
Highs: 12-13

Wellington
Morning cloud breaks to sunny spells, southerly winds.
High: 11

Marlborough & Nelson
Sunny with light winds after a frosty start.
Highs: 10-12

Canterbury
Mostly sunny with light winds, any morning coastal cloud breaks away. A frosty start for many especially inland.
Highs: 8-11

West Coast
Mostly sunny with light winds, there may be some cloud about the coast at times. Perhaps even a drizzle patch at times about Fiordland.
Highs: 8-11

Southland & Otago
Sunny with light winds. A frosty start especially inland.
Highs: 7-10

By Weather Analyst Aaron Wilkinson - WeatherWatch.co.nz http://www.weatherwatch.co.nz/content/wednesdays-national-forecast-...

Posted on May 29, 2018 at 11:37 PM

Tuesday's national forecast

Posted by WW Forecast Team on Tue, 29/05/2018 - 04:00

An anticyclone lies over the South Island today while a southerly airflow lies over the North Island.

Northland, Auckland, Waikato & Bay Of Plenty
Sunny with southerly winds.
Highs: 13-15

Western North Island (including Central North Island)
Mostly cloudy with a few showers, long dry spells also. Showers clearing in the evening. Cool southerly winds.
Highs: 7-12

Eastern North Island
Cloudy with occasional showers, a few snow flurries to 600m. Fresh cold southwesterly winds.
Highs: 11-12

Wellington
Mostly cloudy, a shower or two at times throughout the day. Cold southerly winds.
High: 10

Marlborough & Nelson
Sunny with light winds.
Highs: 10-12

Canterbury
Sunny spells gradually increasing from morning, southwesterly winds ease and die out in the evening.
Highs: 7-9

West Coast
Sunny with light winds.
Highs: 9-11

Southland & Otago
Sunny with light winds, a frosty start especially inland. There may be some cloud hanging about coastal fringes.
Highs: 6-9

By Weather Analyst Aaron Wilkinson - WeatherWatch.co.nz http://www.weatherwatch.co.nz/content/tuesdays-national-forecast-26...

Posted on May 28, 2018 at 11:20 PM

Monday's National Forecast

Posted by WW Forecast Team on Mon, 28/05/2018 - 03:51

A gusty cold southerly airflow lies over New Zealand today, easing from the south as a ridge of high pressure starts to build over the lower South Island.

Northland, Auckland, Waikato & Bay Of Plenty
A few showers Auckland northwards clearing this morning then sunny areas increase, mostly sunny elsewhere after any morning cloud breaks away. Southerly winds.
Highs: 12-14

Western North Island (including Central North Island)
Showers at times, a surge this afternoon may bring an increase in shower activity to the Manawatu and Central North Island areas for a time. Some snow to 500m. Fresh cold southerly winds.
Highs: 6-11

Eastern North Island
Showers, mainly about eastern coastal fringes then becoming widespread this afternoon with heavy falls possible, easing this evening. Some snow to 500 or possibly 400m. Fresh cold southwesterly winds.
Highs: 10-11

Wellington
Showers, heavy this morning with possible hail then easing from afternoon. Snow flurries possible to 400m. Strong southerly winds gusting to gale force through Cook Strait.
High: 10

Marlborough & Nelson
Sunny weather for Nelson, Marlborough sees any morning showers with snow flurries to 400m clearing then some sun breaks through this afternoon. Fresh cold southerly winds.
Highs: 9-12

Canterbury
Showers ease, clearing in the evening for most although a few showers may linger about the coast Banks Peninsula northwards overnight. A few snow flurries to 300m, fresh cold southwesterly winds.
Highs: 7-9

West Coast
Sunny with southeasterly winds.
Highs: 8-12

Southland & Otago
Morning cloud with a few remaining showers then cloud breaking to sun this afternoon. Becoming frosty overnight for inland areas. Cool southerly winds.
Highs: 7-9

By Weather Analyst Aaron Wilkinson - WeatherWatch.co.nz http://www.weatherwatch.co.nz/content/mondays-national-forecast-267...

Posted on May 27, 2018 at 10:30 PM

Friday's national forecast

Posted by WW Forecast Team on Fri, 25/05/2018 - 04:08

A large low pressure system is centred to the east of New Zealand today slowly rotating a cold southwesterly airflow over the country bringing unsettled weather to most regions.

Northland, Auckland, Waikato & Bay Of Plenty
Showers, heavy at times with possible thunderstorms and hail as westerlies freshen. Winds change southwest overnight.
Highs: 13-17

Western North Island (including Central North Island)
Morning rain, possibly heavy with thunderstorms and hail then easing to showers around midday. Showers may reinvigorate late afternoon for a time Taranaki northwards bringing a heavy downpour, some hail and perhaps a further thunderstorm. Wet weather clearing for most during the evening. Snow down to 1000 or perhaps 900m about the Central Plateau. Northwesterlies change south to southwest in the evening.
Highs: 8-14

Eastern North Island
Rain for the Wairarapa spreads into Hawkes Bay late morning then Gisborne by mid afternoon. Before rain moves in expect sunny areas and some high cloud and once rain moves through (lasting a period of perhaps 3 hours max) conditions easing to the odd shower and southwesterlies freshen.
Highs: 13-16

Wellington
Early showers clear then expect some sun, breezy northwesterly winds change southerly in the afternoon. Evening showers.
High: 12

Marlborough & Nelson
Mostly sunny with westerly winds tending southerly in the afternoon. There may be some morning cloud with the chance of a shower for Nelson then breaking away.
Highs: 11-13

Canterbury
Mostly sunny, showers develop over Banks Peninsula with heavy falls and a chance of hail, spreading elsewhere late afternoon or evening as southwesterly winds freshen. Evening snow flurries to 600m.
Highs: 8-12

West Coast
Any early showers clear then expect sunny weather with southerly winds.
Highs: 8-12

Southland & Otago
A mix of sun and cloud, there may be a few showers about coastal Southland then spreading elsewhere during the afternoon. Parts of inland Otago may remain fairly dry after a very cold start. Cool southwesterly winds picking up after midday.
Highs: 7-11

By Weather Analyst Aaron Wilkinson - WeatherWatch.co.nz http://www.weatherwatch.co.nz/content/fridays-national-forecast-311...

Posted on May 24, 2018 at 11:02 PM

Thursday's national forecast

http://www.weatherwatch.co.nz/content/wednesdays-national-forecast-266

A front races northwards over the South Island this morning then pushes northwards over the North Island this afternoon / evening, all in a strong westerly quarter airflow.

Northland, Auckland, Waikato & Bay Of Plenty
Risk of a shower, showers more likely from late afternoon then evening rain. Some sun at times mainly morning. The Bay Of Plenty stays dry for most of the day, not till evening are showers more likely. Breezy Westerly winds.
Highs: 15-18

Western North Island (including Central North Island)
The odd shower then rain develops in the afternoon with possible thunderstorms, west to northwesterly winds strengthen rising to gale at times about coastal areas after midday.
Highs: 11-16

Eastern North Island
Mostly sunny with northwesterly winds strengthening, possibly gusting to gale at times about the Wairarapa from afternoon. The Wairarapa sees cloud thicken up in the afternoon and the odd spot of rain may spread from the west.
Highs: 15-18

Wellington
Some morning sun then a few showers develop in the afternoon as northwesterly winds rise to gale.
High: 15

Marlborough & Nelson
Mostly sunny, northwesterlies strengthen in the afternoon bringing some cloud. Showers from afternoon for Nelson, only a few spots of rain may pass over into Marlborough for a time.
Highs: 12-15

Canterbury
Dry at first with some sun, late morning cloud thickens with a few spots of rain possible as gusty Westerlies develop. Sun then breaks through again in the afternoon. About the high country (inland mountains west of the foothills) expect rain to spill over from the west with snow lowering to 600m.
Highs: 10-15

West Coast
Morning rain, possibly heavy then easing to showers. Showers may still continue to be heavy at times for the rest of the day, perhaps even a thunderstorm or two with small hail. Snow lowering to 500m to most areas by evening. Gusty westerly winds.
Highs: 9-12

Southland & Otago
Showers, some may be heavy at times with a chance of hail. Snow flurries to 500m. Showers becoming much less frequent about inland Otago in the afternoon, clearing evening. Showers clear near the coast in the afternoon with sun then possible. Brisk westerly winds tend southwest overnight.
Highs: 8-11

By Weather Analyst Aaron Wilkinson - WeatherWatch.co.nz http://www.weatherwatch.co.nz/content/thursdays-national-forecast-2...

Posted on May 23, 2018 at 11:29 PM

Wednesday's national forecast

Posted by WW Forecast Team on Wed, 23/05/2018 - 04:00

A front clears off to the northeast of the North Island early this morning, expect a cold southwesterly airflow for the rest of the day.

Northland, Auckland, Waikato & Bay Of Plenty
Showers, some may be heavy with thunderstorms (especially in the afternoon) then easing later in the evening. Brisk west to southwesterly winds.
Highs: 13-17

Western North Island (including Central North Island)
Showers, some may be heavy (especially afternoon with a chance of thunderstorms) then easing later in the evening. Snow lowers to 800m for mountains etc. Breezy westerly winds tend southwest by evening.
Highs: 9-14

Eastern North Island
Morning rain eases to a few showers which continue off and on for the rest of the day, west to northwesterly winds tend southwest by evening.
Highs: 15-17

Wellington
Mostly sunny, some high cloud possible especially morning. Southerly winds develop in the morning.
High: 13

Marlborough & Nelson
Mostly sunny, there may be some high cloud about. Southwesterly winds.
Highs: 12-14

Canterbury
Chance of a morning coastal shower then expect sunny spells, in the afternoon an isolated shower or two may spring up about inland areas. Cool southwesterly winds.
Highs: 8-12

West Coast
Any early rain clears then expect increasing sunny spells with southwesterly winds. Buller sees morning rain ease to showers which continue for the rest of the day.
Highs: 8-11

Southland & Otago
Morning rain eases to showers for Southland, fresh southwestely winds ease in the evening. Otago is dry at first then mid to late morning a few showers move in as westerlies tend cooler southwest (strong about the coast), showers clear in the evening. Some snow possible to 400m, perhaps even 300m for Southland.
Highs: 7-9

By Weather Analyst Aaron Wilkinson - WeatherWatch.co.nz http://www.weatherwatch.co.nz/content/wednesdays-national-forecast-...

Posted on May 23, 2018 at 11:17 PM

Tuesday's national forecast

Posted by WW Forecast Team on Tue, 22/05/2018 - 05:01

A northwesterly airflow strengthens over New Zealand today with a front sliding across the upper North Island during the day, weakening by evening. Another front (this time a cold change) moves onto the lower South Island around midday then slowly moves northwards.

Northland, Auckland, Waikato & Bay Of Plenty
Showers, some may be heavy with the risk of an isolated thunderstorm then easing later this afternoon. Rain moves in overnight, northwesterly winds.
Highs: 17-20

Western North Island (including Central North Island)
Cloudy areas and the odd shower, rain develops overnight. Northwesterly winds strengthen.
Highs: 14-17

Eastern North Island
Mostly sunny with some increasing high cloud, rain develops overnight. Afternoon northwesterly winds.
Highs: 18-20

Wellington
Increasing cloud, the odd shower develops this afternoon then expect overnight rain. Strengthening northwesterly winds rising to gale force later.
High: 16

Marlborough & Nelson
Sunny areas and increasing high cloud, rain develops in the evening. Strengthening north to northwest winds, may rise to gale later in the evening for Marlborough.
Highs: 16

Canterbury
Sunny areas and increasing high cloud, some evening rain as northwesterly winds (strong for inland areas with possible gales) change southwest.
Highs: 15-17

West Coast
Rain with heavy falls and possible thunderstorms, easing to showers in the evening as brisk to strong northwesterly winds change southwest.
Highs: 13-14

Southland & Otago
Morning rain eases to a few showers around midday for Southland as breezy northwesterly winds change gusty westerly. For Otago, mainly dry this morning then around midday rain develops, easing to showers in the afternoon as northwesterly winds (strong about Otago for a time) change gusty westerly. Showers clear by evening for Otago.
Highs: 9-14

By Weather Analyst Aaron Wilkinson - WeatherWatch.co.nz http://www.weatherwatch.co.nz/content/tuesdays-national-forecast-26...

Posted on May 23, 2018 at 11:13 PM

Monday's national forecast

Posted by WW Forecast Team on Mon, 21/05/2018 - 04:00

A cold front moves northwards over the North Island during today then another cold front pushes in hitting the lower South Island overnight.

Upper North Island
Showers, some may be heavy. The Bay Of Plenty is mainly dry with a few showers passing through this afternoon. West to southwesterly winds.

Lower North Island
Early morning rain for the lower western North Island eases to showers, winds gusty from the west then easing from afternoon. The east coast sees morning high cloud with the chance of a spot of rain then becoming mostly sunny in the afternoon, winds from the northwest (a little gusty about the Wairarapa) then easing late afternoon, perhaps tending southwest for a time later in the day. Temperatures will get into the high teens or perhaps early twenties about Hawkes Bay and Gisborne.

South Island
Any early heavy rain for the West Coast of the South Island quickly eases to occasional showers and southwesterly winds, later in the evening rain moves into Fiordland becoming heavy then pushing northwards overnight. Morning showers for the east coast clearing then becoming mostly sunny in the afternoon, cool southwesterlies quickly ease. Later in the evening northwesterly winds build especially inland. Morning rain for Southland quickly eases to showers and they will likely hang around for most of the day, winds gusty from the west.

- WeatherWatch.co.nz http://www.weatherwatch.co.nz/content/mondays-national-forecast-266...

Posted on May 21, 2018 at 12:09 AM

Friday's national forecast

Posted by WW Forecast Team on Fri, 18/05/2018 - 04:03

A westerly airflow lies over New Zealand today, a disturbance in the Tasman Sea moves onto the upper South Island later this afternoon or evening then onto the lower North Island overnight.

Northland, Auckland, Waikato & Bay Of Plenty
Sunny spells, chance of a shower or two otherwise expect long dry spells. Westerly winds. The Bay Of Plenty is mainly dry and mostly sunny.
Highs: 17-19

Western North Island (including Central North Island)
Mostly cloudy with the odd shower, becoming a bit more widespread for a time in the afternoon. Overnight some rain moves in. Breezy west to northwesterly winds.
Highs: 12-16

Eastern North Island
Mostly sunny with some high cloud, gradually increasing from afternoon. Overnight spots of rain move into the Wairarapa. West to northwesterly winds.
Highs: 17-20

Wellington
Mostly cloudy, chance of a shower later in the day then some overnight rain. Gusty northwesterly winds.
High: 15

Marlborough & Nelson
Mostly sunny with high cloud increasing from afternoon, some rain develops later in the evening then clearing overnight. North to northwesterly winds.
Highs: 16-17

Canterbury
Mostly sunny with a touch of high cloud, light north to northwesterly winds.
Highs: 14-16

West Coast
Mostly cloudy with occasional showers, some rain moves into Buller late afternoon then clearing overnight. Westerly winds.
Highs: 11-13

Southland & Otago
Cloudy areas for Southland with a shower or two at times, winds fresh from the west. Otago has mostly sunny weather, perhaps some high cloud at times and northwesterly winds.
Highs: 10-13

By Weather Analyst Aaron Wilkinson - WeatherWatch.co.nz http://www.weatherwatch.co.nz/content/fridays-national-forecast-310...

Posted on May 18, 2018 at 4:26 AM

Thursday's national forecast

Posted by WW Forecast Team on Thu, 17/05/2018 - 04:05

A southwesterly airflow lies over New Zealand today with a front pushing onto the lower South Island this afternoon.

Northland, Auckland, Waikato & Bay Of Plenty
Occasional showers, especially afternoon as southwesterly winds freshen. The Bay Of Plenty stays mainly dry although there is the chance of a shower in the evening. Some sun at times.
Highs: 16-18

Western North Island (including Central North Island)
Mostly cloudy with a few showers, mostly clearing away in the evening. Westerly winds, tending more southwest about Taranaki.
Highs: 12-15

Eastern North Island
A few showers about the Wairarapa spreading into Hawkes Bay and Gisborne during the afternoon as light winds tend southerly. Areas of sun and high cloud before showers move in.
Highs: 14-19

Wellington
The odd shower, clearing in the evening. Southerlies tend northerly late afternoon.
High: 13

Marlborough & Nelson
Morning showers for Marlborough then mostly clearing although a shower or two may hang on till late afternoon, skies are mostly cloudy then breaking away in the evening. Nelson sees morning cloud break to mostly sunny weather. Southerlies tend easterly around midday for Marlborough, afternoon northerlies in Nelson.
Highs: 10-14

Canterbury
Morning showers clear then sunny areas develop, southwesterly winds tend northeasterly in the afternoon.
Highs: 10-12

West Coast
A few showers for Greymouth northwards during the day, some sun at times further south. Rain moves into South Westland during the afternoon then pushes further north in the evening, there may be a few heavy falls. Winds from the southwest then picking up from the west or northwest later in the day.
Highs: 10-13

Southland & Otago
Some morning sun then a few showers from afternoon for Southland as northwesterly winds tend gusty westerly. Otago is mostly sunny, some evening cloud with the chance of a shower.
Highs: 11-13

By Weather Analyst Aaron Wilkinson - WeatherWatch.co.nz http://www.weatherwatch.co.nz/content/thursdays-national-forecast-2...

Posted on May 17, 2018 at 3:25 AM

Wednesday's national forecast

Posted by WW Forecast Team on Wed, 16/05/2018 - 04:00

A low passes over and away to the east of New Zealand today gradually letting in a cold southwesterly airflow.

Northland, Auckland, Waikato & Bay Of Plenty
Showers, some may be heavy in the afternoon with possible thunderstorms then easing in the evening. Northwesterly winds change southwest by evening.
Highs: 18-22

Western North Island (including Central North Island)
Mostly cloudy, rain about Taranaki with heavy falls and possible thunderstorms then easing to showers in the afternoon as northerlies change southwest. Elsewhere expect a fairly cloudy morning with the risk of a shower, showers set in more during the afternoon then clearing evening.
Highs: 16-19

Eastern North Island
Mostly sunny with some high cloud, spots of rain about the Wairarapa with north to northwesterly winds changing southerly there in the afternoon at which point rain sets in a bit more. Rain clears in the evening. Remaining mainly dry further north.
Highs: 18-22

Wellington
Some rain, northerlies change southerly late afternoon. Long dry spells developing in the evening.
High: 16

Marlborough & Nelson
Morning rain (possibly heavy) eases, an isolated shower or two may continue for the rest of the day. Some sun breaks through in the afternoon then overnight cloud thickens up with a slightly higher risk of showers. Light winds.
Highs: 14-17

Canterbury
Any early showers clear, some sun may break through in the afternoon then later in the evening southwesterlies freshen bringing rain. Some snow lowers to 500m overnight.
Highs: 10-13

West Coast
Any early rain clears Buller, mostly sunny otherwise with southwesterly winds. In the evening some cloud develops with the risk of a shower.
Highs: 14-16

Southland & Otago
Dry first thing with some sun then southwesterlies develop mid morning for Southland bringing some rain, rain moves into Otago in the afternoon. Rain clears in the evening. Some snow may lower to 400m by evening then clearing.
Highs: 10-13

By Weather Analyst Aaron Wilkinson - WeatherWatch.co.nz http://communityweather.org.nz/index.php/forums/weather-discussion/...

Posted on May 16, 2018 at 12:41 AM

Tuesday's national forecast

Posted by WW Forecast Team on Tue, 15/05/2018 - 04:03

A low in the Tasman Sea draws in an east to northeasterly airflow over New Zealand today. Conditions may become unstable about the upper North Island.

Northland, Auckland, Waikato & Bay Of Plenty
Occasional showers, perhaps an isolated heavy fall / thunderstorm, especially afternoon. A few dry areas at times also with a chance of sunny spells. Light north to northeasterly winds.
Highs: 19-21

Western North Island (including Central North Island)
Mostly cloudy with occasional showers, dry spells also. Some rain moving through Taranaki at times with a chance of heavy falls. Northeasterly winds.
Highs: 18-21

Eastern North Island
A mostly cloudy morning, some sun breaks through at times this afternoon. A shower or two possible also mainly about the Wairarpa. Northeasterly winds.
Highs: 18-20

Wellington
Mostly cloudy with northeasterly winds, a shower or two but many dry spells also.
High: 18

Marlborough & Nelson
Mostly cloudy with a shower or two, Nelson sees some rain from afternoon with heavy falls possible. Northeasterly winds.
Highs: 16-17

Canterbury
Mostly cloudy with patchy rain or drizzle, northeasterly winds tend southwest in the evening.
Highs: 14-15

West Coast
Mostly sunny with some high cloud, light winds tend southeast.
Highs: 16-17

Southland & Otago
Mostly sunny with some high cloud after any morning fog breaks away, about the Otago coast skies may be a bit cloudier. Light winds.
Highs: 12-15

By Weather Analyst Aaron Wilkinson - WeatherWatch.co.nz http://www.weatherwatch.co.nz/content/tuesdays-national-forecast-26...

Posted on May 16, 2018 at 12:34 AM

Monday's national forecast

Posted by WW Forecast Team on Mon, 14/05/2018 - 04:00

A low continues to sit in the Tasman Sea today drawing in a southeasterly airflow over most of New Zealand although the upper North Island has a northerly airflow.

Upper North Island
Expect a mix of sun and cloud, there could be some fog to start the day also. There may be an isolated shower or two about but plenty of dry spells too. Showers have a slightly higher likely hood towards late afternoon and evening. Afternoon temperatures look to get into the low twenties. Winds are light tending northerly in the afternoon.

Lower North Island
Mostly cloudy weather in the south and east, the odd shower about also but once again many long dry periods. Out west is looking fairly dry with some sun then cloud starts to increase in the afternoon and the odd shower moves in. Winds are from the east or southeast. Afternoon temperatures in the mid teens for Wellington through to Gisborne. Possibly approaching 18 degrees in the afternoon for Taranaki.

Eastern South Island
A mostly cloudy day for the east coast of the South Island through to about South Canterbury or perhaps North Otago, the odd light shower or drizzle patch about with southeasterly winds. Temperatures a bit chilly in the low double figure arena. Inland Otago and Southland see a mix of sun and cloud, mainly dry with temperatures not getting all that warm in the afternoon, still sitting around 11 to 13 degrees.

West Coast
The West Coast of the South Island has a great day however, just some high cloud at times. Afternoon temperatures in the high teens.

WeatherWatch.co.nz http://www.weatherwatch.co.nz/content/mondays-national-forecast-265...

Posted on May 15, 2018 at 11:52 PM

What does this big low mean for New Zealand? We explain the rain (+4 Maps)

Posted by WW Forecast Team on Fri, 11/05/2018 - 10:38

A storm in the Tasman Sea is set to bring a blast of severe weather to the south eastern side of Australia but what does it mean for New Zealand specifically?

For the most part this very large low will be Australia's problem over the next few days however between this large low and the outgoing high we have an area of convergence (air flows that meet) and this occurs over the upper North Island. On top of that a smaller 'spin off' low is approaching the South Island today over the Tasman Sea with a burst of wind and rain.

Generally speaking this weekend the nor'west flow coming out of the storm near Australia plus the sub-tropical north to north east flow coming from the departing high will be meeting over the North Island (or near it - some of the heaviest falls may be just offshore). This means rain will be sub-tropical in nature (so a mix of drizzly spells but also very heavy falls). Due to the slow moving nature of everything these rain bands could cause localised flooding. It will be warmer than average too.

The actual storm itself near Australia won't even reach New Zealand until the end of Tuesday and likely cross the country on Wednesday - so the rain over the next few days is a bit of a precursor. New Zealand lies halfway between the centre of this low near Aussie and the large high to our east.

NEW ZEALAND HIGHLIGHTS
* A small but potent low will this afternoon cross the lower South Island bringing a burst of heavy rain (which will spillover into Otago and Southland for a time) and some brief gales.
* Rain in many parts of northern and western New Zealand next three to five days with heaviest rain in the upper North Island at this stage.
* Warm and humid air will also flow ahead of the low pressure system producing *isolated* thunderstorms.
* Gale winds will also be possible in coastal areas, mainly in the Cook Strait area.
* The small low approaching the South Island today will clear off tonight and a small high will in fact return and cover over the South Island tomorrow.
* Sunshine will return in some areas of the South Island, but the trough will stay in the North Island bringing rain to the northern half on Saturday and further down the eastern side on Sunday. Stll plenty of dry areas.
* On Sunday rain may be heavier, especially in the upper North Island but some of the worst rain may be offshore - so one to monitor.

Link to original article and Maps: http://www.weatherwatch.co.nz/content/what-does-big-low-mean-new-ze...

- WeatherWatch.co.nz - Proud to be an official IBM/TWC business partner

Posted on May 11, 2018 at 12:50 AM

Friday's national forecast

Posted by WW Forecast Team on Fri, 11/05/2018 - 04:00

A low sits west of the South Island today with a front passing over the country from west to east during the day.

Northland, Auckland, Waikato & Bay Of Plenty
A few spits or brief showers then rain develops in the afternoon, rain may be briefly heavy for a time in the evening. Northerly winds.
Highs: 19-22

Western North Island (including Central North Island)
Areas of rain, easing later in the afternoon to the odd shower. There may even be some brief sun break through later in the day before dusk. North to northwesterly winds, gusty about Taranaki then easing in the evening.
Highs: 16-19

Eastern North Island
Cloudy, spots of rain spread into the Wairarapa in the morning then further north around midday. Spots of rain clearing in the evening. Northerly winds.
Highs: 18-20

Wellington
Areas of rain develop in the morning then clearing later in the evening, breezy north to northwesterly winds.
High: 17

Marlborough & Nelson
Rain, heavy in the morning for Nelson then clearing later in the afternoon. Some sun may break through for Marlborough later in the day. North to northwesterly winds pick up after midday.
Highs: 18-19

Canterbury
Some scattered rain develops in the morning, clearing in the afternoon. Some sun may break through later in the afternoon. Light northeasterlies.
Highs: 14-17

West Coast
Rain develops early in the morning, easing in the evening. East to northeasterly winds tend northerly by evening.
Highs: 14-17

Southland & Otago
Mostly cloudy. There may be a few spots of rain or showers in the afternoon then easing or perhaps clearing in the evening. Light winds from the northeast tend southwest about Southland in the afternoon then Otago in the evening.
Highs: 13-14

By Weather Analyst Aaron Wilkinson - WeatherWatch.co.nz http://www.weatherwatch.co.nz/content/fridays-national-forecast-309...

Posted on May 11, 2018 at 12:41 AM

Thursday's national forecast

Posted by WW Forecast Team on Thu, 10/05/2018 - 04:23

A ridge of high pressure slips away from the North Island today meanwhile a northerly airflow lies over the South Island.

Northland, Auckland, Waikato & Bay Of Plenty
Sunny areas and some high cloud, areas of mid level cloud a bit thicker in some spots like Bay Of Plenty, Coromandel and perhaps eastern Northland with the chance of a shower or two. There may also be some morning fog about Auckland and the Waikato. Winds light from the north.
Highs: 19-20

Western North Island (including Central North Island)
Plenty of high cloud, some mid level cloud at times also especially about Taranaki. North to northwesterly winds.
Highs: 17-19

Eastern North Island
Mostly sunny with some high cloud gradually increasing, light north to northeasterly winds.
Highs: 18-21

Wellington
Mostly cloudy with breezy north to northwesterly winds.
High: 17

Marlborough & Nelson
Plenty of high cloud although some sun breaks through at times, north to northwesterly winds.
Highs: 17-19

Canterbury
Plenty of high cloud, some sun may briefly break through at times. Light winds may tend northeast near the coast in the afternoon.
Highs: 16-18

West Coast
Mostly cloudy with the odd spit or shower, some rain moves into South Westland during the morning then eases from afternoon. Northeasterly winds.
Highs: 13-16

Southland & Otago
Thick high cloud, a few spots of rain possible in the afternoon / evening. Light northerly winds.
Highs: 13-16

By Weather Analyst Aaron Wilkinson - WeatherWatch.co.nz http://www.weatherwatch.co.nz/content/thursdays-national-forecast-2...

Posted on May 10, 2018 at 2:50 AM

NZ's MetOcean measures largest wave ever recorded in Southern Hemisphere

Posted by WW Forecast Team on Thu, 10/05/2018 - 06:08

On Tuesday night the MetOcean Solutions wave buoy moored in the Southern Ocean just south of New Zealand recorded a massive 23.8 m wave.

“This is a very exciting event and to our knowledge it is largest wave ever recorded in the Southern Hemisphere,” says Senior Oceanographer Dr Tom Durrant. “Our own previous record was one year ago when we measured a 19.4 m wave, and before that in 2012 an Australian buoy recorded a maximum individual wave (Hmax) of 22.03 m. So, this is a very important storm to capture, and it will add greatly to our understanding of the wave physics under extreme conditions in the Southern Ocean.”

“However, it is likely that the peak heights during this storm were actually much higher, with individual waves greater than 25 m being possible as the wave forecast for the storm show larger wave conditions just north of the buoy location. Also, to conserve battery during the one year deployment, the solar-powered buoy samples the waves for just 20 minutes every 3 hours then sends the data via a satellite link. During that 20 minute recording period, the height, period and direction of every wave is measured and statistics are calculated. It's very probable that larger waves occurred while the buoy was not recording.

“The Southern Ocean is a unique ocean basin and is the least studied despite occupying 22% of the global ocean area. The persistent and energetic wind conditions here create enormous fetch for wave growth, making the Southern Ocean the engine room for generating swell waves that then propagate throughout the planet - indeed surfers in California can expect energy from this storm to arrive at their shores in about a weeks time! Yesterdays storm is the perfect example of waves generated by the easterly passage of a deep low pressure system with associated wind speeds exceeding 65 knots. Such storms are frequent and can occur at any time of the year, which differs from the high latitude northern hemisphere storms that only occur in winter. What is interesting about yesterday's event is the storm speed appears to match the wave speed, allowing wave heights to grow dramatically as the system tracks eastward.”

SIMULATION OF THE STORM: WIND AND MEAN SEA LEVEL PRESSURE (LEFT) AND SIGNIFICANT WAVE HEIGHT (RIGHT) PASSING OVER SOUTH NEW ZEALAND.
“This is exactly the sort of data we were hoping to capture at the outset of the program,” says MetOcean Solutions General Manager Dr Peter McComb, who led the deployment of the buoy in March onboard the HMNZS WELLINGTON. “ We know that the speed of these storms plays an important role in the resultant wave climate and that has great relevance under both the existing and climate change scenarios.”

The ‘significant wave height’ is the WMO standard value to characterise a sea state - approximately the average of the highest third of the measured waves. During this storm, the significant wave height reached 14.9 m. This is also a record for the Southern Ocean, but falls short of the 19 m world record buoy measurement that was recorded in the North Atlantic during 2013.

The Campbell Island Wave Rider Buoy was moored on 2 March 2018 at Campbell Island, New Zealand’s southernmost estate and an ideal spot to sample the complex directional wave spectra from the Southern Ocean.

The Southern Ocean wave studies are a collaborative project with New Zealand Defence Force, Defence Technology Agency and Spoondrift. As part of that program, MetOcean Solutions has deployed seven instruments to collect wave data, using one moored and six drifting buoys. All data are freely available to the scientific community and can be viewed in real time. For further information and data access seehttp://www.metocean.co.nz/southern-ocean/... or contact us at enquiries@metocean.co.nz.

- Provided to WeatherWatch.co.nz by MetOcean
- Link to original post and Graphics. http://www.weatherwatch.co.nz/content/breaking-news-new-zealands-me...

Posted on May 10, 2018 at 2:47 AM

Wednesday's national forecast

Posted by WW Forecast Team on Wed, 09/05/2018 - 04:00

An anticyclone brings mainly settled conditions to New Zealand today.

Northland, Auckland, Waikato & Bay Of Plenty
Mostly sunny, some cloud at times about the Waikato. West to southwesterly winds.
Highs: 20-21

Western North Island (including Central North Island)
Morning cloud may bring a shower or two then expect sunny spells, west to northwesterly winds ease.
Highs: 16-19

Eastern North Island
Sunny with light winds in the morning, tending east to northeast in the afternoon near the coast.
Highs: 19-22

Wellington
Mostly sunny weather with northerly winds.
High: 18

Marlborough & Nelson
Sunny with light winds.
Highs: 18-20

Canterbury
Sunny with afternoon east to northeast winds.
Highs: 15-17

West Coast
Mostly sunny with light winds after any early cloud breaks away. Fiordland sees cloudy periods however and a light shower or two with light northerlies.
Highs: 13-16

Southland & Otago
Mostly sunny with west to northwesterly winds easing in the afternoon.
Highs: 15-16

By Weather Analyst Aaron Wilkinson - WeatherWatch.co.nz http://www.weatherwatch.co.nz/content/wednesdays-national-forecast-...

Posted on May 10, 2018 at 2:39 AM

Tuesday's national forecast

Posted by WW Forecast Team on Tue, 08/05/2018 - 04:00

Westerlies build today ahead of a front which moves onto the lower South Island late afternoon then moves northwards.

Northland, Auckland, Waikato & Bay Of Plenty
Mostly sunny with light west to southwesterly winds.
Highs: 19-20

Western North Island (including Central North Island)
Cloudy areas, may be a shower or two at times. Breezy west to northwesterly winds.
Highs: 15-18

Eastern North Island
Sunny with light winds for Hawkes Bay and Gisborne, perhaps tending northeast in the afternoon near the coast. The Wairarapa has a mainly sunny day also although northwesterly winds are a little breezy at times during the day.
Highs: 18-21

Wellington
Morning sun then some cloud from afternoon, breezy northwesterly winds.
High: 17

Marlborough & Nelson
Mostly sunny with some high cloud, north to northwesterly winds.
Highs: 17-20

Canterbury
Sunny areas and increasing high cloud, northwesterly winds pick up becoming strong in the evening about inland areas. Winds ease overnight.
Highs: 18-20

West Coast
Mostly cloudy with the odd shower, rain moves into South Westland in the afternoon with heavy falls. Pushing northwards in the evening however this area of rain will weaken. Northwesterly winds increase then changing west to southwest in the evening.
Highs: 14-16

Southland & Otago
Sunny areas and some high cloud, late afternoon or evening northwesterly winds change strong westerly bringing some rain which clears later in the evening. A shower or two may hang about coastal Southland overnight.
Highs: 17-18

By Weather Analyst Aaron Wilkinson - WeatherWatch.co.nz http://www.weatherwatch.co.nz/content/tuesdays-national-forecast-26...

Posted on May 08, 2018 at 3:52 AM

Monday's national forecast

Posted by WW Forecast Team on Mon, 07/05/2018 - 03:00

An anticyclone is centred west of the North Island in the Tasman Sea today directing a west to southwesterly airflow over New Zealand.

Northland, Auckland, Waikato & Bay Of Plenty
Chance of a shower this morning otherwise mainly dry with long sunny spells and some cloud, southwesterly
winds.
Highs: 18-20

Western North Island (including Central North Island)
May be an early shower then expect mostly sunny weather with west to southwesterly winds.
Highs: 14-17

Eastern North Island
Sunny with light winds, perhaps tending onshore in the afternoon about Hawkes Bay and Gisborne.
Highs: 17-20

Wellington
Mostly sunny with northwesterly winds.
High: 16

Marlborough & Nelson
Mostly sunny with some high cloud possible. West to northwesterly winds for Marlborough, southwesterlies for Nelson.
Highs: 17-19

Canterbury
Mostly sunny with a touch of high cloud. Northwesterly winds, gusty about inland areas.
Highs: 17-19

West Coast
Cloudy with areas of rain or showers, westerly winds.
Highs: 13-15

Southland & Otago
Cloudy about Southland with showers or some rain at times, clearing at night. Otago has sunny areas and some high cloud. West to northwesterly winds, strong about coastal Southland.
Highs: 14-17

By Weather Analyst Aaron Wilkinson - WeatherWatch.co.nz http://www.weatherwatch.co.nz/content/mondays-national-forecast-264...

Posted on May 08, 2018 at 3:46 AM

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OhauitiWeather

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Total Posts: 421
Joined: February 27, 2012

Wednesday's national forecast

Posted by WW Forecast Team on Wed, 15/08/2018 - 04:00

A weak ridge of high pressure moves onto the South Island this morning, southwesterlies ease later in the day elsewhere.

Northland, Auckland, Waikato & Bay Of Plenty
Showers ease during the day…

Posted on August 15, 2018 at 4:53 AM

OhauitiWeather

OhauitiWeather
Total Posts: 421
Joined: February 27, 2012

Tuesday's national forecast

Posted by WW Forecast Team on Tue, 14/08/2018 - 04:00

A low pressure system gradually passes over New Zealand today moving from west to east, winds from the north changing to the southwest during the evening and overnight.

Northland, Auckland, Waik…

Posted on August 13, 2018 at 11:28 PM

OhauitiWeather

OhauitiWeather
Total Posts: 421
Joined: February 27, 2012

Monday's National Forecast

Posted by WW Forecast Team on Mon, 13/08/2018 - 03:54

A ridge slips away from the North Island today then northerlies build over New Zealand during the day, a front pushes in from the west in the evening.

Northland, Auckland, Waikato & Bay Of Plent…

Posted on August 13, 2018 at 2:08 AM