Re: Funnel Cloud over Akld

Paul Mallinson · Unread post by **Paul Mallinson** » Thu 10/03/2011 15:58

Hi folks,

There shouldn't be much happen in the Auckland area today due to subsidence aloft (warming aloft) which is only allowing quite shallow convection. The deepest instability (similar that in the Auckland area yesterday) is up over northern Northland.

Paul

Manukau heads obs · Thu 10/03/2011 17:19

someone does not think so...
http://www.nzherald.co.nz/nz/news/artic ... d=10711405

spwill · Unread post by **spwill** » Thu 10/03/2011 18:10

A Funnel cloud can occur in very shallow instability but the stronger covergence today was out to the east of the city, a SW breeze pushing through, a dry day across the region

photo shows shallow towering Cu this morning

Paul Mallinson · Unread post by **Paul Mallinson** » Thu 10/03/2011 19:00

The ingredients present yesterday were:
- Cloud depth to about 4-5kms (as NZStorm mentioned).
- Very bouyant sounding in the lower part of the cloud - generates a strong updraft.
- Triggered by afternoon heating on the sea breeze convergence over Auckland (westerlies meeting easterlies).

Some local topography probably induced some curvature in the winds on the convergence and with the lift into the cloud, the funnel gets set up by the strong low level updraft.

These conditions were not present today.

Paul

NZstorm · Unread post by **NZstorm** » Thu 10/03/2011 19:02

The instability cleared out this morning. Back into summer now with a big warm up aloft.

Another photo of the funnel as seen from Grey Lynn.

Paul Mallinson · Unread post by **Paul Mallinson** » Thu 10/03/2011 19:04

Nice shot.

Paul

Manukau heads obs · Thu 10/03/2011 19:52

personally I think the media should have quoted a better explanation than what was presented for what caused yesterday's funnel
Your explanation Paul is what was needed
just my opinion

I see Phillip is trying to beat up the conditions to justify his moderate prediction of another funnel cloud?
http://www.weatherwatch.co.nz/content/a ... r-upper-ni
good he though points out the chances of getting 2 in a row is not great
agree with that....no 2 days are ever exactly the same for ingredients!

Michael · Unread post by **Michael** » Thu 10/03/2011 21:05

Remember N.Z Storm saying last week it was ripe for such weather above too.(cold air above)

Thunder · Unread post by **Thunder** » Thu 10/03/2011 23:13

Cool! Always good to see a funnel!

NZstorm · Unread post by **NZstorm** » Fri 11/03/2011 07:41

Remember N.Z Storm saying last week it was ripe for such weather above too.(cold air above)

Yes, cold air is a good predictor for landspouts/waterspouts, particularly at this time of year with the surface environment being so warm.

spwill · Unread post by **spwill** » Wed 16/03/2011 13:56

A very good clip of the funnel cloud here, http://www.youtube.com/watch?v=qKU2WfrtYk8

Manukau heads obs · Wed 16/03/2011 14:06

nice, apart from the background noise, LOL

NZ Thunderstorm Soc · Wed 16/03/2011 21:24

I thort the background noise was lovely

JohnGaul
NZThS

jamie · Unread post by **jamie** » Tue 22/03/2011 08:16

found this on metservice pic of the week. most of you have probably already seen it but my word its a nice picturehttp://www.flickr.com/photos/metservice-nz/5535728912/

Manukau heads obs · Tue 22/03/2011 08:29

wow, no, had not see that one
great shot that!
really shows the amount of rotation.....which to me shows how " under rated" funnels clouds are

spwill · Unread post by **spwill** » Tue 22/03/2011 08:36

jamie.haultain wrote:found this on metservice pic of the week. most of you have probably already seen it but my word its a nice picturehttp://www.flickr.com/photos/metservice-nz/5535728912/

Over Mangere Mnt so the funnel cloud was a little further west than I thought.
May have been a Landspout or waterspout, the visible funnel was well down

NZstorm · Unread post by **NZstorm** » Tue 22/03/2011 10:00

really shows the amount of rotation.....which to me shows how " under rated" funnels clouds are

In the high plains of USA they get quite powerful landspouts, up to F2 but ofcoarse there is massive instability there.
In this country the instability values are generally too low for spouts to come to much.

Nev · Unread post by **Nev** » Tue 22/03/2011 10:36

spwill wrote:
jamie.haultain wrote:found this on metservice pic of the week. most of you have probably already seen it but my word its a nice picturehttp://www.flickr.com/photos/metservice-nz/5535728912/
Over Mangere Mnt so the funnel cloud was a little further west than I thought.
May have been a Landspout or waterspout, the visible funnel was well down

Yes, noticed that. MetVUW also have a nice shot looking N from the airport on their current homepage and another saying, 'approximately over Greenlane' here.

Manukau heads obs · Tue 22/03/2011 11:04

I had not noticed those cool sat movies on metvuw before (scroll right down)
eg
http://www.metvuw.com/movie/200608-low-full.mov
I really like this one
http://www.metvuw.com/movie/200606-low-full.mov

mikestormchaser · Unread post by **mikestormchaser** » Fri 25/03/2011 20:47

Those photos certainly suggest it may have touched down, very low anyways! i wonder what kind of winds that would pick up if it had touched down?

jamie · Unread post by **jamie** » Sat 26/03/2011 10:08

Manukau heads obs wrote:I had not noticed those cool sat movies on metvuw before (scroll right down)
eg
http://www.metvuw.com/movie/200608-low-full.mov
I really like this one
http://www.metvuw.com/movie/200606-low-full.mov

you can certainly see why June 2006 was so darn cold.

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