Author Topic: Hailstorm : NSW Storms (incl Sydney hailstorm): 7 to 9th December 2007  (Read 143452 times)

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Offline Jimmy Deguara

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RE: Hailstorm : NSW Storms (incl Sydney hailstorm): 7 to 9th December 2007
« Reply #75 on: 14 December 2007, 03:04:38 AM »
Hi David:

Thanks for your comments

Quote
28th October 1996 storm

should read 28th October 1995 storm

I want to clear this before people are confused:) (For those wandering that I am being brutal, this is a little joke between myself and David - I told David offline).

For those interested, there are two reports on this event which Geoff Thurtell and I chased:

http://www.australiasevereweather.com/storm_news/1995/docs/9510-01.htm

revised chase report
http://www.australiasevereweather.com/storm_news/1998/docs/9803-02.htm

There is no doubt this was a larger storm and if my memory serves me correctly, horses were knocked out near Cobbity I think. The worst hail David would have occured in the rural areas. This storm was much better structured and also more potent and long lived than the recent event. As you say the 9th December event was compact and seems to have maximised in one major pulse and then lost a lot of intensity - perhaps veering more into a HP supercell stage based on my pictures and radar imagery.

Regards,

Jimmy Deguara
« Last Edit: 13 February 2008, 03:35:19 AM by Jimmy Deguara »
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Offline Macca

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RE: Hailstorm : NSW Storms (incl Sydney hailstorm): 7 to 9th December 2007
« Reply #76 on: 14 December 2007, 06:57:47 AM »
David,

Quote
Tamworth supercell that happened on the 7th

Can someone confirm if this is the case - ie 'supercell'? Was there any other larger hailstones reported?

Regards,

Jimmy Deguara

Hi all,

A few more photos of this storm and its structure are located here.

http://forum.weatherzone.com.au/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=17;t=000343;p=5

Cheers,

Macca

Offline Jimmy Deguara

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RE: Hailstorm : NSW Storms (incl Sydney hailstorm): 7 to 9th December 2007
« Reply #77 on: 14 December 2007, 07:21:58 AM »
Macca,

What seems to be your assessment of this given the pictures you refer to?

Regards,

Jimmy Deguara
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Offline Jimmy Deguara

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RE: Hailstorm : NSW Storms (incl Sydney hailstorm): 7 to 9th December 2007
« Reply #78 on: 14 December 2007, 07:40:24 AM »
Some more pictures I forgot to invclude given I was so busy - damage from the hailstorm:

Hail damgae to vehicles including broken and punch windows






Damage to buildings


hailstones the size of tennis balls - very solid so weight needs to be taken into account


I have yet to see hailstones larger than this one but I do believe hailstones 8 to 9cm in diameter are possible.

Regards,

Jimmy Deguara
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Offline Mike

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RE: Hailstorm : NSW Storms (incl Sydney hailstorm): 7 to 9th December 2007
« Reply #79 on: 14 December 2007, 08:28:10 AM »
Ouch that hurts.  Nice cricket ball hail there Jimmy - something i'd not like to get clocked with.  'Knock of $10,000 on that car will you mate and I'll buy it.'

Mike
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Offline David C

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RE: Hailstorm : NSW Storms (incl Sydney hailstorm): 7 to 9th December 2007
« Reply #80 on: 14 December 2007, 09:30:19 AM »
Regarding the Tamworth storm, there seems to be cell merger ~ 6:40UTC,  and a new core that develops at 7:10, or another merger given the two separate cores at 7:00. That's a solid echo at 7:30 all things considered. Looking at the photos in the link, they were taken in the hills looking some distance to the west or southwest. The first photo shows interesting structure - given the base, and inflow bands, stuff happening behind the hills, reports of severe weather, and assuming this coincides with best radar imagery, well I'd say it's a pretty organised storm at the least early on. The rest of the photos show the cell collapsing with a ragged shelf cloud remaining. Unfortunately, while radar is great on a chase it wont make the car go any faster -- it would be nice to see photos taken from along the Werris Ck road .

« Last Edit: 14 December 2007, 09:46:37 AM by David C »
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Offline James

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RE: Hailstorm : NSW Storms (incl Sydney hailstorm): 7 to 9th December 2007
« Reply #81 on: 14 December 2007, 11:52:32 PM »

Another interesting note about Sunday's supercell over Sydney was from a reporter I spoke to who spoke to Rob Webb at the BOM about this storm. Rob mentioned to him that at its highest, the cell over Sydney reached 15kms above sea level. I had a look at a sounding to work out what that was in feet and was amazed to see a figure of nearly 50,000 feet. That's extremely impressive for down this way as most storms in this latitude seem to range between 30,000 and 40,000 feet.

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RE: Hailstorm : NSW Storms (incl Sydney hailstorm): 7 to 9th December 2007
« Reply #82 on: 15 December 2007, 12:12:25 PM »
Just a quick video still of the Sydney Supercell from the eastern side of the storm, note the beaver tail inflow band on the left hand side and wall cloud in the middle right.

[attach=#]
« Last Edit: 15 December 2007, 12:38:50 PM by Phillip BJ »

Offline Mike

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RE: Hailstorm : NSW Storms (incl Sydney hailstorm): 7 to 9th December 2007
« Reply #83 on: 20 December 2007, 09:35:07 AM »
Any indications of whether this hailstorm would be the costliest to date?  I don't know how many you've had there but I know of one a while back that the bill was quite high.  Has any reports come out as to the damage bill for this event yet?

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Offline Richary

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RE: Hailstorm : NSW Storms (incl Sydney hailstorm): 7 to 9th December 2007
« Reply #84 on: 20 December 2007, 02:28:47 PM »
Not even close to the 1999 hailstorm, but then that hit over a much more densely populated area (the eastern suburbs). From wikipedia:

The 1999 Sydney hailstorm was the costliest natural disaster in Australian history, causing extensive damage along the east coast of New South Wales. The storm developed south of Sydney on the afternoon of April 14, 1999 and struck the city's eastern suburbs, including the central business district, later that evening.[1]

The storm dropped an estimated 500,000 tonnes of hailstones in its path.[2][3] Insured damages caused by the storm were over A$1.7 billion,[4][5] with the total damage bill (including uninsured damages) estimated to be around A$2.3 billion, equivalent to US$1.5 billion.[6][7] It was the costliest in Australian history in terms of insured damages, overtaking the 1989 Newcastle earthquake that had resulted in A$1.1 billion in insured damages. Lightning also claimed one life during the storm, and caused approximately 50 injuries.[8][9]


A report on the ABC website from last Thursday says the recent storm damage has hit $138 million, so pretty small compared to the 1999 one.

Offline Mike

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RE: Hailstorm : NSW Storms (incl Sydney hailstorm): 7 to 9th December 2007
« Reply #85 on: 20 December 2007, 05:20:41 PM »
Ah thanks for that Richary.  I knew the 99 storm was costly but just had no idea of what it was.  It's one of those events that I was not 'glued' to since joining the forum late as it were :)

As a result of that event did premiums rise or policies change as a consequence?  Would be interesting to find out if the actual number of people adding hail damage to their insurance policies to date!
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Offline Jimmy Deguara

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RE: Hailstorm : NSW Storms (incl Sydney hailstorm): 7 to 9th December 2007
« Reply #86 on: 24 December 2007, 02:28:49 PM »
Hi all,

I am going to encourage some links to You Tube videos or similar of the western Sydney hailstorm in particular:

David Croan told me of this one - actually David I think these are larger than 8cm:
http://www.youtube.com/watch?v=L4yZoLeDdzw&feature=related

err watch the exclamations after all this langauge is not unique to western Sydney
http://www.youtube.com/watch?v=ZqCtaFqqJqE&feature=related   


Nice microburst followed by hail
http://www.youtube.com/watch?v=gneFMzFJG1c

Very large hailstones
http://www.youtube.com/watch?v=9x3RKt-iarA

http://www.youtube.com/watch?v=5cskWLqs3MA

http://www.youtube.com/watch?v=cBumdZv2SoE


http://www.youtube.com/watch?v=c3CBU_RLN-0&NR=1

Some timelapse
http://www.youtube.com/watch?v=LBtTeib-eIU&feature=related

very large hails splashing in the pool
http://www.youtube.com/watch?v=FGNhafD1nkc&NR=1

What you should not do in a hailstorm - very large hail in this shot in his hand 8-9cm??
http://www.youtube.com/watch?v=CykBamRTaOs&feature=related

Some giant stuff possible in this clip
http://www.youtube.com/watch?v=IK4rFrUpVEY&feature=related
Turn down the volume - the song ruined the video

Ignore the music and watch the hail splatter
http://www.youtube.com/watch?v=svQN-Zk46p0&NR=1


http://www.youtube.com/watch?v=9feKo9Fd_AI

Not the best video
http://www.youtube.com/watch?v=NPll7C5Hgi0&feature=related

http://www.youtube.com/watch?v=FjBwlzyQr_U&feature=related

This is another one of those funny I want to save it videos
http://www.youtube.com/watch?v=uJizylby0XM&feature=related

unclear video
http://www.youtube.com/watch?v=nRdnqLUSHRU&feature=related

some video and pictures
http://www.youtube.com/watch?v=d9uvzluqkME

Hills area hailstorm  unclear footage
http://www.youtube.com/watch?v=F7D5oHz3peE

Baulkham Hills hailstorm
http://www.youtube.com/watch?v=g5P2YJV0Snc

Hornsby hailstorm
http://www.youtube.com/watch?v=9ERYqzzfcnA

Glenwood hailstorm
http://www.youtube.com/watch?v=phZvn09ZsJg

Regards,

Jimmy Deguara
« Last Edit: 26 December 2007, 06:49:19 AM by Jimmy Deguara »
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Gambit

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RE: Hailstorm : NSW Storms (incl Sydney hailstorm): 7 to 9th December 2007
« Reply #87 on: 30 December 2007, 07:05:45 AM »
Great post Jimmy thanks for collating all that for us. Really good to see the vids!

Regards

Mat

Offline Mike

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RE: Hailstorm : NSW Storms (incl Sydney hailstorm): 7 to 9th December 2007
« Reply #88 on: 30 December 2007, 08:04:55 AM »
Entertaining to say the least!  Language not unique to western Sydney?  I'm not from there obviously and don't know what that means!  Some great video of what not to do with stuff that size, covering up your car with iron?  I think the damage is done!

Mike
« Last Edit: 30 December 2007, 08:13:59 AM by Jimmy Deguara »
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Gambit

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RE: Hailstorm : NSW Storms (incl Sydney hailstorm): 7 to 9th December 2007
« Reply #89 on: 30 December 2007, 08:14:57 AM »
Mike, I think that Jimmy was referring to the possibility of somewhat "colourful" Language that may have been present.