Unstable period, Early July (North Island)

Vertigo · Unread post by **Vertigo** » Mon 06/07/2009 13:11

good sounding profile today, but not much top to the cold pool.

jamie · Unread post by **jamie** » Mon 06/07/2009 13:14

Yup, that was the one! good shot Graeme

Tornado Tim · Unread post by **Tornado Tim** » Mon 06/07/2009 13:37

Thunderstorm In Waitakere atm.

spwill · Unread post by **spwill** » Mon 06/07/2009 13:41

Have been hearing thunder here from the west for the past 5 mins. Raining here.

jamie · Unread post by **jamie** » Mon 06/07/2009 13:52

oh good i wasnt dreaming then.. thought i heard thunder about 5 mins ago.

Just saw a flash above Takapuna

David · Unread post by **David** » Mon 06/07/2009 13:53

A few rumbles heard here, but the thunderstorm has passed well to the north of here.

GraemeWi · Unread post by **GraemeWi** » Mon 06/07/2009 13:56

Heaps of hail here on the shore,

Nev · Unread post by **Nev** » Mon 06/07/2009 14:09

Yes, great shot Graeme!

Wow, lightning tracker looks impressive now!

Thought I also heard thunder about an hour ago (12:50pm), but not much on the lightning tracker then? The 1pm radar looks interesting though... could that have been a hook just NE of Rakino Is?

EDIT: Included a portion of the 1pm radar image.

spwill · Unread post by **spwill** » Mon 06/07/2009 14:33

Yes that is a great Cb shot by Graeme.
Here is a photo of the Cb clouds (thunderstorm) moving away to the NE. Storm moved from West Coast across the lower Northshore out into the Waitemata.

Nev · Unread post by **Nev** » Tue 07/07/2009 07:39

Some very interesting personal accounts of the Kaitaia tornado in this story from The Northern Advocate...

'20 homes damaged: clean-up to take weeks'

NZstorm · Unread post by **NZstorm** » Tue 07/07/2009 07:48

The maximun recorded wind gust from that AWS was 47 knots between midday and 1pm on Saturday.

Interesting report. 47kt gusts do not damage buildings so this would not be fully representative of the vortex strength. I think it would take a gust in excess of 70kts to do the damage in the pic below. We don't often see roof damage like this in New Zealand. The EF1 scale is in the 75kt+ range.

Just posting this pic again for reference.

Paul Mallinson · Unread post by **Paul Mallinson** » Tue 07/07/2009 17:27

That Northern Advocate article was a very informative and dramatic account of what happened. Tend to agree with NZstorm's comments.

We are lucky no one was injured or killed.

Paul

Nev · Unread post by **Nev** » Tue 07/07/2009 20:57

Yes, further to what Brian said, most of the reported damage to the hospital occurred at the boiler house, administration block and A&E dept. Given that they all suffered roof damage, I'd assume they're much further away from the main block, which has the anemometer mounted at one end and a wind-sock at the other. I doubt whether either instrument would have survived a direct hit.

jamie · Unread post by **jamie** » Wed 08/07/2009 08:40

its really coming down here right now. Rain rate is at 30mm/h

DT-NZ · Unread post by **DT-NZ** » Fri 10/07/2009 14:10

Paul Mallinson wrote:Many thanks DT-NZ for your efforts with the photos.

Thank you, keep safe.

DT-NZ · Unread post by **DT-NZ** » Fri 10/07/2009 14:14

Foggy wrote:Is that a stevenson screen there too on top of Kaitaia hospital? (I'd be thinking it'd be giving less than desirable observations...)

04072009-KTA.jpg

Excerpt taken from - The Northern Advocate - Monday, July 8, 2009.

The strongest gust recorded at the weather station atop Kaitaia Hospital on Saturday was 90km/h but going by the damage the wind may have hit 100-120km/m.
________

late i know with this info, but, it's not been a great week, but, that's life... anyway... keep safe, take care.

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Unstable period, Early July (North Island)

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