General December Weather

NZstorm · Unread post by **NZstorm** » Sun 30/11/2014 08:03

First day of summer looks cool but at least there will be a warming trend from Tuesday on.

A polar trough will progress across the North Island tomorrow with a few lightning strikes possible over the central ranges and in the east. There is a slight risk of a hail storm in the Hawkes Bay as the southerly arrives.

GFS afternoon shower chart for tomorrow.

NZstorm · Unread post by **NZstorm** » Sun 30/11/2014 18:12

850mb temps for first day of summer.

NZ Thunderstorm Soc · Sun 30/11/2014 19:03

Nice

Nev · Unread post by **Nev** » Mon 01/12/2014 08:49

MS have a moderate risk for most of the central and lower North Island and top of the South island in this morn's T-Storm Outlook for today…

MetService - Thunderstorm Outlook

Valid to: Midnight Monday 1 Dec 2014
Issued at: 8:37am Monday 1 Dec 2014

A cold showery south to southwesterly flow covering the South Island and lower North Island this morning, will spread northwards onto the central North Island today. At the same time, temperatures are expected to become colder aloft causing the atmosphere over central New Zealand to become increasingly unstable this afternoon and evening.

Scattered heavy showers and thunderstorms are expected to develop this afternoon and evening over the Nelson region, and about many parts of the North Island south of about Rotorua and Te Kuiti.

These thunderstorms will produce localised heavy rain and hail. The hail is mostly expected to be in the 10-15mm diameter range, however there may be signifcant hail accumulation in a few places this afternoon, particularly about the NELSON region. Hail can cause damage to crops and orchards, and make driving conditions hazardous.

A low risk of thunderstorms covers other areas from Bay of Plenty and South Waikato southwards to northern Westland as indicated on the chart.

No other thunderstorms or significant convection expected over New Zealand today.

MetService T-Storm Outlook - Dec 1, 8.37pm.png

spwill · Unread post by **spwill** » Mon 01/12/2014 09:02

A cold looking trough for December, eastern NI high country in the firing line for thunder and hail this afternoon for sure.

Dale · Unread post by **Dale** » Mon 01/12/2014 09:51

Lots of coldies offshore this morning from here up towards Westport, looks quite nice.. although distant.

tich · Unread post by **tich** » Mon 01/12/2014 10:58

Not very summery start to December - can see snow on Mt Herbert through gaps in the cloud.

TonyT · Unread post by **TonyT** » Mon 01/12/2014 12:19

And just had a small hail shower here...

matttbs · Unread post by **matttbs** » Mon 01/12/2014 13:45

Quite a decent dump of snow on the mountains this morning, white all the way down to 500m. Got 18.3mm last night. 11c now do a rather chilly start to summer

NZstorm · Unread post by **NZstorm** » Tue 02/12/2014 06:56

7 day rainfall here. Looking drier now, should get a 10 day dry run for Auckland.

spwill · Unread post by **spwill** » Tue 02/12/2014 07:52

I reckon the upper level Summer ridge arrived here two weeks ago.( a tendency for upper level ridging over northern NZ)

SnwAddct · Unread post by **SnwAddct** » Tue 02/12/2014 08:18

Absolute stunning day in Auckland today already.. Currently about 12 degrees

Nev · Unread post by **Nev** » Tue 02/12/2014 08:28

Down to 8.3C here at 6:40am... bit nippy for Dec, but loving current the longer days.

jamie · Unread post by **jamie** » Tue 02/12/2014 08:35

For some reason all my record temps have gone Wakky but I'm pretty sure the 3.6 temp this morn would be a decker record for me. Rather chilly

David · Unread post by **David** » Tue 02/12/2014 08:45

7.4C min here.

spwill, looks like you might have to find a new thunderstorm vantage point

The days of driving to the summit of Auckland's volcanic cones are coming to an end, starting with a ban on all vehicles up Mt Eden.

This could be followed by a ban covering the summits of other volcanoes with road access - One Tree Hill, Mt Wellington, Mt Albert, Mt Roskill and Mt Victoria.

A new authority to manage 14 volcanic cones yesterday approved in principle extending a 2011 ban on buses driving to the summit of Mt Eden/Maungawhau to all vehicles.

http://www.nzherald.co.nz/nz/news/artic ... d=11367244

Manukau heads obs · Tue 02/12/2014 09:08

You might have to get a disability sticker or maybe a media sticker?

Razor · Unread post by **Razor** » Tue 02/12/2014 09:44

Runnign the Kepler Challenge again on Saturday. A lot of unseasonable snow last couple of weeks, but looks to be relatively warmer and ok this week. Maybe a sprinkle of rain on Saturday to stop any overheating...

Dale · Unread post by **Dale** » Tue 02/12/2014 10:15

MS might want to review their forecast maximums for the West Coast.. just shy of 10am and already 0.5 degrees shy of the predicted maximum of 16 for today. Absolute belter of a day here & about time!

spwill · Unread post by **spwill** » Tue 02/12/2014 10:19

David wrote:
spwill, looks like you might have to find a new thunderstorm vantage point

The days of driving to the summit of Auckland's volcanic cones are coming to an end, starting with a ban on all vehicles up Mt Eden.

I use Mt Roskill these days as Mt Eden is too busy. I think the people/car problems are on Mt Eden.

tich · Unread post by **tich** » Tue 02/12/2014 10:54

Some showers returned to Chch for a time overnight, but gone by dawn.
Central NI mountains have taken on a winter appearance this morning, according to the webcams.

Dale · Unread post by **Dale** » Tue 02/12/2014 11:31

Maximum reached just before 11am.. how much higher can we go

jamie · Unread post by **jamie** » Tue 02/12/2014 21:50

Anyone see the balloon on the news over Hamilton today? It's on stuff website. Is it a weather balloon or a google internet balloon? http://www.stuff.co.nz/waikato-times/63 ... -of-wonder

Skywatcher · Unread post by **Skywatcher** » Wed 03/12/2014 06:42

Looks like a google loon - I think they launched one or two from Tekapo a couple of weeks ago.

jamie · Unread post by **jamie** » Wed 03/12/2014 08:28

Yea apparently in sat in the sky from 10 till 3.

Nev · Unread post by **Nev** » Wed 03/12/2014 11:29

I see MS have a moderate risk of T-Storms for Canterbury tomorrow arvo…

MetService - Thunderstorm Outlook

Valid to: Midnight Thursday 4 Dec 2014
Issued at: 10:39am Wednesday 3 Dec 2014

The cold front continues moving north over the South Island during the afternoon and evening. Over the Canterbury Plains and the foothills during the afternoon there is a moderate risk of thunderstorms, mainly with the frontal change. Any thunderstorms that develop will have the potential to bring localised heavy rain of 10-20mm/hr, hail 10-20mm in diameter and strong winds gusting 90-110km/hr.

Over remaining high country areas of Canterbury and also about northern and eastern areas of Otago there is a low of thunderstorms during the afternoon,while over Marlborough there is a low risk of thunderstorms in the evening.

No thunderstorms or significant convection expected in other areas of the country during the period.

MetService Tstorm Outlook Map - Dec 4, pm.png

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