South Island Storms - 5/12

Archive of NZ Weather & Climate
Chris W
Posts: 1445
Joined: Tue 04/11/2014 18:13
Location: Lyttelton

Re: South Island Storms - 5/12

Unread post by Chris W »

There's a dark cloud out to sea that provided a dramatic backdrop against the Port Hills when I drove back to Lyttelton just now. Reasonably bright this side, but just coming onto moderate rain now.
mikestormchaser
Posts: 2771
Joined: Sat 03/06/2006 20:11
Location: Rolleston, Canterbury

Re: South Island Storms - 5/12

Unread post by mikestormchaser »

spwill wrote: Sun 05/12/2021 20:18 Yes, spill over rain in the afternoon dampens down the instability.
The set ups where cold upper level air is the major ingredient are more reliable for thunderstorm development especially in December.
Yes I prefer a cold upper trough for Canterbury. And that was my main concern today. However I did think if a storm could get going it might of been OK given the strong shear and DP Today.


Here is the best shot I got today, Steve, Aaron and I gave it a shot and went south of ashburton before cutting inland this evening.. we had to give it a shot because if we didn't then something would of happened...

I total bust day though but nice dark bases observed with the S change
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Mike
Stormchasers.co.nz
Chris Raine
Posts: 952
Joined: Thu 17/04/2003 11:54
Location: Thornbury

Re: South Island Storms - 5/12

Unread post by Chris Raine »

Heavy rain in Southland at 2200 after a day of continuous light rain in the southerly. Falling at 30mm/hr then stopped
NZ Thunderstorm Soc
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Joined: Wed 12/03/2003 22:08
Location: Raukapuka Geraldine

Re: South Island Storms - 5/12

Unread post by NZ Thunderstorm Soc »

Flooding in the Wellington region with this storm with lots of mill-litres according to the reporter on Checkpoint this afternoon.
85.8ml at Kelburn today, above it's monthly average of 83.2mm
Hutt River up with flooding in Lower Hutt and the Johnsonville Line closed because of a slip.
JohnGaul
NZThS