Convective Possibilities, North Island - 9,10,11 Feb 07

GreggWard · Unread post by **GreggWard** » Sat 10/02/2007 17:10

Great photos Foggy. Were the storm ones of the Matamata storm?

Willoughby · Unread post by **Willoughby** » Sat 10/02/2007 17:17

GreggWard wrote:Great photos Foggy. Were the storm ones of the Matamata storm?

Hey, that's Hamilton East there (5 cross roads).. about 3km NE of here.

It was the same storm line that went through Morrinsville.

Paul Mallinson · Unread post by **Paul Mallinson** » Sat 10/02/2007 17:28

I'm home now.

Sure looks like things are hummin.

That last pic of yours Foggy is an especially interesting on. I think we are seeing the CB going up through the Pileus Cap cloud around the top edges of the storm. Most often we see this from the side as Brian showed yesterday I think it was in one of his pics - whereas this is a shot from below.

Paul

KiwiWeather · Unread post by **KiwiWeather** » Sat 10/02/2007 17:34

Yes, that last picture of Foggy's is great.

This is the best one I have of that funnel cloud and the other is the fun on its way.

(The funnel was just above the first big tree to the left), it had extended out much longer, but this was as quick as I could grab the camera.

Cameo1 · Unread post by **Cameo1** » Sat 10/02/2007 17:43

hey guys, long time no speak. I was on top of mount richmond in Otahuhu when the storm opened up directly above me. I observed an extremely large funnel cloud aprox 500m wide plus over the south down factories near west field about 1km away from me. It had an almost square appearance and the whole sky seemed to be twisting and contorting with the lightning flickering above me. WOW. When I returned to New Lynn thunder was very slowly approaching from where I had just left. Then it was pretty much constant thunder and very close, crackling lightning. Then it just stopped.

spwill · Unread post by **spwill** » Sat 10/02/2007 18:10

I headed down into north Waikato about 2pm but perhaps I should have stayed in Ak with that funnel cloud sighting

. Some very nice build ups down there, thunder, Lightning and heavy rain.

Manukau heads obs · Sat 10/02/2007 18:13

what an afternoon!!!
waiuku has got plastered with lightning and heavy rain (15mm)

i didnt have to chase, it chased me!!!!!!
but i did not have my camera while milking the cows

boy, i have never seen a CB build against a sea breeze as good as this one did
check out what my video camera got!!!...rotating mesocyclone!
http://www.weather-display.com/aucklandcb.wmv

there was some great banding around the CB too as it came across the manukua harbour...just like what i have seen in the USA.....this was a mesocylcone....the detailed rain radar should have shown rotation to confirm ?

Willoughby · Unread post by **Willoughby** » Sat 10/02/2007 18:25

Manukau heads observer wrote: boy, i have never seen a CB build against a sea breeze as good as this one did
check out what my video camera got!!!...rotating mesocyclone!
http://www.weather-display.com/aucklandcb.wmv

Gregg pointed that out.. and man that is so awesome.

It's still firing though.. to the south with the southeasterly pushing up against the sea breeze over the King Country hills.

Looks like a new Cb has developed in the vicinity of Maungaweka.

Edit: More so Te Kuiti.

C-Nimbus · Unread post by **C-Nimbus** » Sat 10/02/2007 18:26

wow that is an awesome lil movie there brian, and yes the rotation was definately noticeable, so possibly mesocyclonic

we went down to mercer and shot 2 koi carp, one big and one small. While we were there thunder could be heard all around. Initially it sounded like it was over bombay, and then later further south.

awesome gust front on the second system, but didn't have camera on us as we were carrying the bow etc etc.

still some more convection (crisp as anything) up towards helensville/kaipara way.

today reminded me of the explosive convection we got on Waitangi Day 2006 when the waterspout was caught of Waiheke.

great day for sure!!!!

NZstorm · Unread post by **NZstorm** » Sat 10/02/2007 18:35

I spent late afternoon in the northern Waikato as far south as Huntly, got to see some nice CG lightning but didn't see much in the way of storm structure.

Mind you, the best clouds were out to the west and hard to get to because of poor roading network.

Great video there Brian.

NZstorm · Unread post by **NZstorm** » Sat 10/02/2007 19:26

Just one pic here, of the cb tops over Morrinsville mid afternoon. The tops are punching the tropopause with pileus. Hail reported from this storm.

ricky · Unread post by **ricky** » Sat 10/02/2007 19:40

Just back from a drive around.. sure was a great day!

didn't get far into the Waikato in the end, enjoyed watching from the bombays for a while, saw some interesting mamatus at Mercer, and had some good torrential rain and CGs on the way down the sthn motorway..
Here are the two FC pics i got, was quite brief, you can see by the time i found a clear view it was receding.. although did become quite wide with some good rotation above!

Manukau heads obs · Sat 10/02/2007 19:52

WOW!!!!!!!
great stuff Ricky!!!!!!!!!

you can see the wall cloud and all, which the funnel comes down out of

I could see that wall cloud from over this side of the manukau

at the time, the top of the CB looked like the one Steven took a photo of the one over Morrinsville

almost could be some big hail stones caught in your photo there ricky?
(white streaks)?
or maybe just big drops of rain

ricky · Unread post by **ricky** » Sat 10/02/2007 19:53

A shot from the southern motorway... this was the active area more Waiuku way a little bit later..

spwill · Unread post by **spwill** » Sat 10/02/2007 20:11

Wow GREAT pics Ricki

Photo below, tail end of Cb line near Huntly

NZstorm · Unread post by **NZstorm** » Sat 10/02/2007 20:28

Yes, well done Ricky. No question, a nice funnel there.

RODALCO · Unread post by **RODALCO** » Sat 10/02/2007 20:49

Great photo's guys,
After i heard the first rumble of thunder around 16.44 h, i went for a quick drive to Waikumete cemetery near Glen Eden.
Interesting cloud formations and possible rotation although i missed out on a FC.
I spotted one very good vertical strike at 17.15 h and then it started raining, although it didn't last that long and was already clearing less than one hour later.
A couple of very low rainbows were visible very briefly over the city but couldn't get a shot from it.
Looking forward to more action.
Raymond

Paul Mallinson · Unread post by **Paul Mallinson** » Sat 10/02/2007 20:59

Some very nice pics - especially Ricky's of the wall loud and funnel.
There wasn't very much shear today as I recall but I guess the vigor of the convection plus some local forcing lead to the funnel(s). Will take a look at the radar info tomorrow to see if any rotation is evident.

Has anybody heard of any rainfall rates or hail sizes with these storms?

Paul

Manukau heads obs · Sat 10/02/2007 21:07

Paul, this Waiuku station:
http://ps.gen.nz/~hamgap/waiuku.htm
shows about 15mm in about 20 minutes
it also shows nicely the temperature drop and wind direction change too

the rain drops were big...but the density of drops was not all that high..thats what i noticed

Willoughby · Unread post by **Willoughby** » Sat 10/02/2007 21:49

That's an awesome shot Ricky!!

Here are a few more shots...
Departing storm, looking northwest.

HDR images...

And capping (no pun intended) a great day off was a great sunset to boot.

dija · Unread post by **dija** » Sat 10/02/2007 22:58

wow, great pics guys, keep it up.

boring day down here, although our temp highs from the last 3 days of 30Â° has dropped heaps and windy to boot.

Storm Struck · Unread post by **Storm Struck** » Sun 11/02/2007 00:41

Looks like another good day up there great pics especially Ricky's funnel cloud love the rotation

.
We got close on Friday evening to getting a thunderstorm here as seen in the other topic but to be honest it has been about nearly two years since we have had a decent thunderstorm go overhead. I am usually not one to complain but I can remember back to 2004 when we were getting lots of storms and you North Islanders were not so you must know what seat we are in

.
We have had thunderstorms but they seem to go around chch alot mainly because of alot occur in W-SW flows so they tend to move offshore as apposed to a southerly. Bring back the years before 2005

.
Just thought i would have my natter even though i am happy i heard thunder the other day distant though

.
I am off up to Havelock,Picton for a week I will come back with some nice pics hopefully

.
Cheers
Jason.

C-Nimbus · Unread post by **C-Nimbus** » Sun 11/02/2007 09:11

slightly off topic, but heres one of the koi carp i shot during the thunderstorms yesterday.

this fish is about 15lb in weight

spike_01 · Unread post by **spike_01** » Sun 11/02/2007 09:54

Great pics folks... All that drama up there and we had and still have wall to wall blue sky... No wind at all and certainly no sign of any rain...

03Stormchaser · Unread post by **03Stormchaser** » Sun 11/02/2007 09:55

C-Nimbus wrote:slightly off topic, but heres one of the koi carp i shot during the thunderstorms yesterday.

this fish is about 15lb in weight

Nice koi there mate!!
Dunno about that rip in your pants though!!

NZ Weather Forum

Convective Possibilities, North Island - 9,10,11 Feb 07

A Couple of Pic's

FC photo's