Upper Cold Pool - Thundershowers/Hail - May 14th

Tornado Tim · Unread post by **Tornado Tim** » Tue 13/05/2014 08:39

Forecast still looking quite good for some Thundershowers laced with Hail come tomorrow.
The LLCC of the trough of Low Pressure is forecasted a bit further south taking the stronger upper level winds further south as well.
Auckland should have a reasonable chance of getting some Thundershowers, especially with the stronger upper level winds around there.

Waikato/BOP also has a risk of a Thundershower laced with hail, any residual daytime heating will be off use.

The Upper level cold pool will pass the central North Island overnight on Wednesday/Thursday,dragging the risk of storms offshore on Thursday.

David · Unread post by **David** » Tue 13/05/2014 10:36

Metservice going for low risk at this stage.

spwill · Unread post by **spwill** » Tue 13/05/2014 11:26

The coldest upper air is showing more of a land track now which is a negative, should still see a few storms with this system tomorrow.

bpo · Unread post by **bpo** » Tue 13/05/2014 17:41

More light snow on the tops around here today.

ben g · Unread post by **ben g** » Wed 14/05/2014 07:04

One flash seen to west around 530, nice cb to west of Akl

ImageUploadedByTapatalk1400007869.406926.jpg

Nev · Unread post by **Nev** » Wed 14/05/2014 09:12

For posterity…

MetService - Thunderstorm Outlook

Valid to: Midnight Wednesday 14 May 2014
Issued at: 8:38am Wednesday 14 May 2014

A shallow low and accompanying cold pool aloft are expected expected to move eastwards across the North Island today with scattered heavy showers and a few thunderstorms.

The main risk of thunderstorms is about the western North Island (mainly near the coast) from the Manukau Harbour down to North Taranaki until late afternoon,and also about Hawkes Bay from this evening. Elsewhere over the North Island a broad low risk of thunderstorms covers remaining areas from Auckland down to Manawatu as indicated on the chart. Any thunderstorms that occur will bring brief heavy rain, small hail and squally wind gusts to about 80 km/hr.

In the South Island, there is a low risk of one or two thunderstorms about Fiordland and Stewart Island this evening associated with a weakening frontal rainband.

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

MetService T-Storm Map to Midnight May 14.png

Manukau heads obs · Wed 14/05/2014 09:36

torrential rain and squally winds just after 9am here
another one forming and heading this way

David · Unread post by **David** » Wed 14/05/2014 11:33

Certainly some heavy downpours around, just had 5mm in 15 minutes here.

NZstorm · Unread post by **NZstorm** » Wed 14/05/2014 12:24

Thunder heard to NW. Looking dark in that direction from here in Grey Lynn.

Nev · Unread post by **Nev** » Wed 14/05/2014 13:36

Quite a few crackles and rumbles out here since about 11:40am…

Tornado Tim · Unread post by **Tornado Tim** » Wed 14/05/2014 14:52

Nice little hail shower here now....

David · Unread post by **David** » Wed 14/05/2014 15:53

Not much in the way of rain here since midday. A wintry feel to the day - the the temperature mostly around 14 this afternoon.

Area51 · Unread post by **Area51** » Wed 14/05/2014 16:01

Very heavy shower activity moving across Auckland Intl airport at this time, temp has dipped to 11C!

David · Unread post by **David** » Wed 14/05/2014 17:58

Radar has been showing rain crossing our area for the last 15 mins, but it's not raining! Very strange.

David · Unread post by **David** » Wed 14/05/2014 18:02

Lots of thunder in the distance though

spwill · Unread post by **spwill** » Wed 14/05/2014 18:20

Some distant thunder here early afternoon otherwise not much in the way of showers over my house today but plenty of Cb around, some photos.

Michael · Unread post by **Michael** » Wed 14/05/2014 19:34

We got heaps in the afternoon but that's the SW for ya!

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