NZ Weather Forum

75mm in 45mins:
https://www.stuff.co.nz/national/109036 ... s-out-road

Weather bomb lol

Sent from my Redmi Note 4 using Tapatalk

Is there a chance that Southland storm is rotating? Would love to see better radar shots of it. Looks very odd on radar we have available!


Sent from my iPhone using Tapatalk

Overcaste day with low clouds and fairly persisitent precip in Auckland today. Not a nice day although not cold with max 21C.

There may be an isolated LP supercell over the east of the South Island tomorrow south of Timaru or in Southland.

Amazing amount of rain in such a short time

einzack wrote: ↑Mon 03/12/2018 20:45 75mm in 45mins:
https://www.stuff.co.nz/national/109036 ... s-out-road

Terrible report in this article

"A weather bomb has resulted in flash flooding around Gladstone School near Carterton"



EDIT: Just saw melja post above, when will they learn!

Other than the Mokoreta storm it was a quiet day in Southland .Will see what tomorrow brings .Mokoreta is in the middle of nowhere only isolated farms in the valley

Aaron from WW popped into see me today. He had been observing today's storm around the back of Geraldine.
"Up on the Downs" as they say around here
....anyway some pictures.

Next trough coming in from the Tasman is kicking off quite a few strikes on Northland ATM. Also quite a few sparks just off the west coast of Auckland.

Cyclone Tracy wrote: ↑Tue 04/12/2018 05:01 Next trough coming in from the Tasman is kicking off quite a few strikes on Northland ATM. Also quite a few sparks just off the west coast of Auckland.

The Northland portion was well indicated in the modelling. The storms are elevated. Hopefully Auckland can catch a storm.

non stop spherics on the am band!

jamie wrote:Would love to see better radar shots of it. Looks very odd on radar we have available!


Sent from my iPhone using Tapatalk

That will never happen...

Woken by a roll of thunder here. Sounded east, out to sea

NZstorm wrote: ↑Mon 03/12/2018 21:02 Overcaste day with low clouds and fairly persisitent precip in Auckland today. Not a nice day although not cold with max 21C.

There may be an isolated LP supercell over the east of the South Island tomorrow south of Timaru or in Southland.

Interesting, can you tell us what numbers your looking at for future reference as to why a severe thunderstorm like that would accour? I can see high instability around timaru south.. strong jet stream etc and lots of surface moisture but the upper air isnt that cold and no real S change.
Thanks in advance

03Stormchaser wrote: ↑Tue 04/12/2018 06:27

jamie wrote:Would love to see better radar shots of it. Looks very odd on radar we have available!


Sent from my iPhone using Tapatalk

That will never happen...

I hope you are wrong. Maybe we should start an online petition and start hassling some politicians or something?

Expecting to hear thunder here shortly but it could miss us, north Auckland looking better placed.

Thunder going off every 10 seconds or so in Hamilton atm, heading into Raglan now, will be good

mikestormchaser wrote: ↑Tue 04/12/2018 06:46

NZstorm wrote: ↑Mon 03/12/2018 21:02 Overcaste day with low clouds and fairly persisitent precip in Auckland today. Not a nice day although not cold with max 21C.

There may be an isolated LP supercell over the east of the South Island tomorrow south of Timaru or in Southland.

Interesting, can you tell us what numbers your looking at for future reference as to why a severe thunderstorm like that would accour? I can see high instability around timaru south.. strong jet stream etc and lots of surface moisture but the upper air isnt that cold and no real S change.
Thanks in advance

I often look at lapse rates and anything over 6.5 is potentially quite unstable. The lapse rates will steepen to 7.0 later this afternoon for Otago/Southland. 500mb temps quite cold at -20C. Some upper flow and 300mb divergence there to assist. Will come down to degree of surface heating as airmass is capped.

Where do you go to see lapse rates? Would be nice to see some severe hail!! Could be oppotunity for you to go chase john being close to you. Driving into Christchurch from rolleston this morning, its abit unstable already and had sporadics

Distant thunder to west.

Mike I just compute the lapse rates off the gfs. Temp difference between 850mb and 500mb devided by the hieght difference.

Some very impressive anvils over the Southern Alps this morning, very picturesque. However I was driving, so no photos unfortunately.

Wow that storm had sooo much bark. Big thunder every few seconds but didn’t have much bite.


Sent from my iPhone using Tapatalk

Rumbling away in the west, distant.

More or less core punched the storm as I came into work this morning, some very nice pink positive forks come which lit entire sky up..... Driving into it was interesting as it looked featureless and had dark slight green hue to it. Not a bad storm , despite being rather messy....

Line number 2 coming into Raglan now,, thunder rumbling away...

One front through at my location(Thornbury) mid Southland . Currently overcast 14C .5.1 mm in the gauge.Satellite photo shows a gap then the next trough .Sky will need to clear for some surface heating

Hearing distant thunder now to the west. Hopefully doesn't do the usual trick and die away as it moves east...