Labour Weekend Low, 20th-24th

spwill · Unread post by **spwill** » Sun 22/10/2006 22:35

What the heck is a gust front? (as forcast by metservice for tomorrow)

Down draft in a Thunderstorm causing a gusty wind change with the arrival of the Storm.

Was on the Coromandel today, grim weather over there, overcast with light showers.

Willoughby · Unread post by **Willoughby** » Sun 22/10/2006 22:46

Michael wrote:You mean SE of Wanganui,its about 1/2 way to Bulls
Foggy Hamilton wrote:Reaching 60mm now just SW of Wanganui..
http://www.weatherlive.co.nz/

Had some short bursts of heavy showers here around lunch.. it remains cloudy and moist though.

Ahh yes, SW of Wanganui would be in the sea!!

dija · Unread post by **dija** » Sun 22/10/2006 23:18

Hi all,
just saw a extra lot of traffic on my stats and see it originated from here so had a nosey and seeing this looks like another great weather forum i just had to join on in

As for the rain, its slowed quite a bit since earlier today. just light drizzle now. maybe the calm before the deluge?

gllitz · Unread post by **gllitz** » Mon 23/10/2006 07:39

dija wrote:Hi all,
just saw a extra lot of traffic on my stats and see it originated from here so had a nosey and seeing this looks like another great weather forum i just had to join on in

As for the rain, its slowed quite a bit since earlier today. just light drizzle now. maybe the calm before the deluge?

Welcome to the forum, dija!

Michael · Unread post by **Michael** » Mon 23/10/2006 08:09

Your SE are a bit like Canterbury SW ie they can bring rain especially if southerly enough through the strait or through the gorge but once more easterly its fine and calm

GraemeWi · Unread post by **GraemeWi** » Mon 23/10/2006 08:59

Cameo1 wrote:What the heck is a gust front? (as forcast by metservice for tomorrow)

There is a nice pic of one on metvuw's site http://www.metvuw.com/ under pic of the week - text that goes with the pic below

Pam Stevenson on MetVuw site wrote:
'Your website is great and so informative. Thought this pic would interest you, taken about 14:15 this afternoon, 2 October 2006. Now we know how New Zealand breeds tough yachties like Sir Peter Blake!! Note the little Opti's sailing off Bucklands beach despite the dramatic storm approaching!!' wrote Pam. "

Cameo1 · Unread post by **Cameo1** » Mon 23/10/2006 10:24

spwill wrote:
What the heck is a gust front? (as forcast by metservice for tomorrow)
Down draft in a Thunderstorm causing a gusty wind change with the arrival of the Storm.

Was on the Coromandel today, grim weather over there, overcast with light showers.

Thanks Spwill and GraemeWi

Willoughby · Unread post by **Willoughby** » Mon 23/10/2006 11:14

That front has just cleared the Far North, and is starting to wrap around the low nicely.

12mm so far here, baro dropping off quickly

MetService sounding very upbeat with the thunderstorm potential.. just hope the cooling aloft gets really going tonight.

Interestingly GFS has progged quite a bit of heavy rain just off the Waikato coast from midnight tonight.. not often it would show that.

spwill · Unread post by **spwill** » Mon 23/10/2006 11:23

Looks like our frontal rain should clear around 2pm, yes clearing through Northland now.
14C, dewpoint is around 14C.

Manukau heads obs · Mon 23/10/2006 11:39

wind increasing now from the NE here now
(gusting to 23 kts so far anyway at least)
rate of barometer drop is accelerating too...

Cameo1 · Unread post by **Cameo1** » Mon 23/10/2006 12:03

Getting lighter in regards to rain and brightness in sunlight(solar?)

C-Nimbus · Unread post by **C-Nimbus** » Mon 23/10/2006 12:44

Once the front has cleared does anyone think there will be enuff time left in the day for daytime heating?

it is clearing quite quick, i see its clearing over kaipara now....

C-Nimbus · Unread post by **C-Nimbus** » Mon 23/10/2006 12:45

looks like some nice Cb's developing behind the front now actually,

Manukau heads obs · Mon 23/10/2006 13:00

yes, a second front looks to be develoing....that will be the one to watch

Paul Mallinson · Unread post by **Paul Mallinson** » Mon 23/10/2006 13:40

The skies are clearing over Northland and should clear down to Auckland by mid to late afternoon.

The midday Whenuapai sounding is cooling aloft as expected.

Looking good for deep convection - first developing over Northland and then spreading down into Auckland.

There is small low circulation that is moving onto the far northwest of Northland and should move down across the province. This will aid wind convergence and help trigger the action.

Paul

mikestormchaser · Unread post by **mikestormchaser** » Mon 23/10/2006 13:50

Good luck too you north islanders up there for thunderstorms today

A pretty dull day in Christchurch with some boring low cloud,and a cool NE breeze.
Turning southerly later on as expected, along with rain tonight/ tomorrow.
Could be some heavy falls tomorrow morning!

Willoughby · Unread post by **Willoughby** » Mon 23/10/2006 14:03

Thanks Paul, yes looking okay for Northland within the next few hours with the wrap around.

Nice heavy shower-line hitting the South Kaipara Heads at the moment..

C-Nimbus · Unread post by **C-Nimbus** » Mon 23/10/2006 14:06

Foggy Hamilton wrote:Thanks Paul, yes looking okay for Northland within the next few hours with the wrap around.

Nice heavy shower-line hitting the South Kaipara Heads at the moment..

yeah i just saw that, its got a really sharp leading edge and it certainly has the rainfall in it.

whats the tropo height today anyone?

Cameo1 · Unread post by **Cameo1** » Mon 23/10/2006 14:18

I think this storm will develop regardless of afternoon sun shine. It's looking great out there at the moment.

Willoughby · Unread post by **Willoughby** » Mon 23/10/2006 14:21

Looking at around 12km over Northland, but in today's conditions they wont have much of a chance getting to those heights.. I would think.

Manukau heads obs · Mon 23/10/2006 14:27

lightning strikes now showing up on that front from my detector

(note, I have narrowed down the fence the short is on, and the owner keeps turning that section back on again!

Paul Mallinson · Unread post by **Paul Mallinson** » Mon 23/10/2006 15:00

If all goes according to plan, average tops may go to 24,000ft and temp -35C and max tops to about 33,000ft temp -42C.

(The tropopause was at about 27,000ft on the noon Whenuapai flight).

Paul

Manukau heads obs · Mon 23/10/2006 15:09

approaching CB line...

Paul Mallinson · Unread post by **Paul Mallinson** » Mon 23/10/2006 15:11

Radar hail detection algorithm now detecting 5 to 15mm hail over southern Northland and in that line down towards Brian.

Paul

C-Nimbus · Unread post by **C-Nimbus** » Mon 23/10/2006 15:18

very heavy rain just before in henderson, with intermittent small hail.

almost looked gust-fronty as it came thru