Heavy showers/ Thunderstorms Nov 24th

[spwill]

Upper level cold air creates instability across New Zealand tomorrow, Thursday. Areas most at risk for thunder are those areas exposed to the westerly flow and the east of South Island where afternoon/evening convergence occurs.

[Nev]

MS have matained a moderate risk for much of the North Island, Canterbury/Otago and Southland for later today...

MetService Thunderstorm Outlook

Unstable westerlies affect New Zealand today.

There is a moderate risk of thunderstorms across the North Island, from Northland to northern Wellington and across the ranges of Hawke's Bay and Gisborne. These thunderstorms may produce brief heavy rain and small hail, strong wind gusts of up to 100 km/h, and a slight chance of a small coastal tornado. The risk for most of Northland eases early afternoon but persists in the south. A moderate risk of thunderstorms also extends over northern Westland and Buller, easing in northern Westland by evening. These thunderstorms may produce brief heavy rain and small hail. A moderate risk of thunderstorms extends over the south of Fiordland, Southland and Clutha during the afternoon and early evening. Afternoon and evening wind convergences are expected to bring a moderate risk of thunderstorms from Dunedin to the Canterbury coast and Plains, with localised heavy rain and hail.

A low risk of thunderstorms extends over other parts of the North and South Island, as indicated on the chart.

MetService Thunderstorm Outlook Map - Is. 24 Nov 8.18am.png

Issued: 8:19am Thu, 24 Nov
Valid to midnight Thu, 24 Nov

[darcyplumb]

Not looking like a ‘typical’ storm day here in Mid Canterbury yet. High cloud, quite cool at 14 degrees C. Plenty more hours in the day for that to change though.

[David]

Another 15mm here this morning. Probably the wettest I've seen the ground in November, almost 100mm over the past 8 days.

[mikestormchaser]

Not looking like a ‘typical’ storm day here in Mid Canterbury yet. High cloud, quite cool at 14 degrees C. Plenty more hours in the day for that to change though.

In a weird twisted way Saturday for me looked better than today.

Still a risk for sure today for the Canterbury region however if things do fire I think it will stay very coastal today's chances

[darcyplumb]

Not looking like a ‘typical’ storm day here in Mid Canterbury yet. High cloud, quite cool at 14 degrees C. Plenty more hours in the day for that to change though.

In a weird twisted way Saturday for me looked better than today.

Still a risk for sure today for the Canterbury region however if things do fire I think it will stay very coastal today's chances

In my experience, days with W to NW air flow don’t produce decent thunderstorms around here. Happy to be told otherwise. I’d love for a good storm to prove me wrong but I just can’t see it happening today.

[spwill]

For Canterbury watch the convergence later in the day, coastal winds will be onshore this afternoon. The upper air is cold today.

[Storm Struck]

Agree it was always going to be westerly this morning then the ridge opens this afternoon to allow onshore winds in.
The high cloud should clear in the coming hours, westerly has dropped here now.
Indeed a coastal slot from Timaru to Banks Peninsula but this boundary shifts to over Christchurch tonight with an increase in moisture.
Watch those hail stones too.

[darcyplumb]

Maybe I’ll eat my words… some nice towers going up to my south. Westerly has died off and high cloud is mostly gone.

[TonyT]

In my experience, days with W to NW air flow don’t produce decent thunderstorms around here. Happy to be told otherwise. I’d love for a good storm to prove me wrong but I just can’t see it happening today.

It's all about the instability. :=)

[Orion]

It's trying to rain at the moment, the odd heavy drop plopping on the roof.
Seems to have gone easterly/ESE?
Temp. 19.9°C and falling.

[Richard]

I gesstermate there a 1 to 3% chance of any excitement this afternoon around this parts, steady moderate NW here, not ideal setup.

[Storm Struck]

Flicking between Northerly and ENE here now with plenty of TCU going up, even over Banks Peninsula way.
Best window is between 4pm and 8pm.

[dogmelon]

There was that thunderstorm we had in chc on a sw change some years back where it was nw beforehand and you'd swear a storm could never happen so never say never about the nw thing.

[NZ Thunderstorm Soc]

Nothing much happening down here. a lot of Cu clouds but all lacking pregnancy. The odd one or 2 spits occurring.
Wind mainly from the westerly sector.

[spwill]

It has been a mainly fine breezy afternoon here, might hear some thunder here late evening with some cold showers.

[Razor]

Thunder in Tai Tapu. Impressive buildups

[dogmelon]

Edit: Never mind. I don't know anything and no one likes what I say.

[Thunder081]

Looking cool south of Christchurch!

IMG_20221124_171910.jpg

[Thunder081]

Just seen a forked lightning!

[NZ Thunderstorm Soc]

Clouds now going up around the Mt. Peel/4 Peaks area or TC.
A bit of a fresh SE here now.

[tich]

Looks to be moving east on radar at this stage, instead of heading towards Chch.

[Karliosis]

Saw a couple of flashes over the Port Hills about 20 minutes ago from Moorehouse Ave. Few rolls of thunder heard from Somerfield before that. Looks to me that will be it for today.

[Storm Struck]

Took a quick chase out to birdlings flat well halfway anyway just past Motukarara, as I thought the cell might skirt offshore like they usually do.
Had some heavy rain and hail about 5mm through just before Tai tapu, only observed one flash though.
Just some rain shafts in a photo for reference
Update 7:40pm new thunderstorm coming out of Mt Peel and some down near Oamaru.

20221124_182201.jpg

[Powermad]

Saw BP... Heading south