Author Topic: NSW Coastal Rain Event (incl Lennox Head tornado) : 2-5 June 2010  (Read 14644 times)

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Offline Mathew Townsend

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RE: NSW Coastal Rain Event (incl Lennox Head tornado) : 2-5 June 2010
« Reply #15 on: 04 June 2010, 02:58:43 PM »
Some more astonishing footage from Lennox Head from NBN news (apologies if someone has posted this already haven't looked through all the pages). Truly an amazing sight and its a miracle that no-one was killed given the destruction.

http://www.nbntv.com.au/index.php/2010/06/03/lennox-head-tornado/

Click on the video player to view

Do you mind have that as on youtube? Im having trouble downloading it off NBN website because the picture tends to freeze.

Offline Harley Pearman

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RE: NSW Coastal Rain Event (incl Lennox Head tornado) : 2-5 June 2010
« Reply #16 on: 05 June 2010, 03:03:42 PM »
Sydney's Rainfall for 4 June 2010

Further to Troy's post, Sydney has had some significant rainfall including some local flash flooding especially across Sydney's East and North. Up until 9 am, some rainfall totals exceeded 60 mm. Even in some western suburban areas, rainfall totals were quite significant. The Bureau of Meteorology rainfall plot for Sydney till 9 am for 4/6/2010 is attached below. Since 9 am, further significant rainfalls have occurred and cumulative falls in some areas exceed 100 mm.

This morning 4/6/2010, I decided to drive to Bathurst and take a look at the weather west of the Blue Mountains. Interestingly the eastern slopes of the Blue Mountains has also had significant rainfalls and water has ponded in many areas along roadsides and significant runoff was evident. I found that the downpours are not penetrating west of Mt Lambie. The weather was fine and partly cloudy in Bathurst and clear sunny conditions prevailed further west. Driving back to Sydney, I experienced increasing low cloud around Mt Lambie, then drizzle at Lithgow, light rain and low cloud at Katoomba and moderate to heavy rain and showers descending the Blue Mountains to Penrith and heavy rain by the time I reached Parramatta at around 4 pm.

The heavy downpours / flash flooding scenes and severe weather is not penetrating too far west of the Blue Mountains. A range of weather features associated with the east coast low was evident through this 170 km cross section I did.  


Harley Pearman
« Last Edit: 06 June 2010, 12:41:52 AM by Harley Pearman »

Offline Richary

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RE: NSW Coastal Rain Event (incl Lennox Head tornado) : 2-5 June 2010
« Reply #17 on: 05 June 2010, 04:16:57 PM »
I spent the morning in the office at Chatswood, before heading to the eastern suburbs in the afternoon. Some very heavy but brief downpours for most of the day, with 61mm recorded since 9am at Observatory Hill.

News reports tonight indicated another tornado (obviously still getting over yesterday) that was almost certainly a waterspout that crossed the coast at Bronte severely damaging one house (roof ripped off) with no other damage in the area, though 10 reported it had also caused damage at Maroubra - but that could have been a separate event and they had no pictures backing up the damage reports there.

There was no lightning activity anywhere near Sydney on stormtracker that I saw, and the wind/rain radar obs showed nothing out of the ordinary that would have been a supercell to give rise to an actual tornado.

Offline Harley Pearman

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RE: NSW Coastal Rain Event (incl Lennox Head tornado) : 2-5 June 2010
« Reply #18 on: 06 June 2010, 12:59:32 AM »
Sydney's Rainfall for 5/6/2010

Sydney's rainfall for 5 June 2010, is consistent with the cross section drive I did from Bathurst to Parramatta on 4/6/2010. Light falls observed in far western Sydney to quite heavy falls east of Blacktown to the coast as shown in the rainfall plot for 5/6/2010 (BOM 5/6/2010).

Only 8 mm at Penrith to 73 mm at Hornsby 70 mm at Terrey Hills, 61 mm at Sydney Observatory Hill and 42 mm at North Parramtta which is where I finished my drive. This morning the rain and showers have eased considerably.

Richary, I was aware of another report of wind damage and flood damage in Sydney's east because I was listening to Radio Station 95.3FM there and back so I knew what was happening. This is the first time, I have driven a cross section of an east coast low from its outer edge back into Sydney and it makes driving quite interesting at times.


Harley Pearman

Offline Michael Bath

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Re: NSW Coastal Rain Event (incl Lennox Head tornado) : 2-5 June 2010
« Reply #19 on: 06 June 2010, 03:18:14 AM »
Another clip of the Lennox Head tornado

Lennox Head Tornado - Exclusive Footage Only On 7

Attached are the Brisbane soundings, obviously they don't show the low level shear in place at Lennox Head but the rest of the profile is ideal for thunderstorms.

Location: Mcleans Ridges, NSW Northern Rivers
Australian Severe Weather:   http://australiasevereweather.com/
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Contact: Michael Bath

Offline Mathew Townsend

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Re: NSW Coastal Rain Event (incl Lennox Head tornado) : 2-5 June 2010
« Reply #20 on: 06 June 2010, 04:29:56 AM »
Wow thanks MB, that is so awesome video clip. Certainly EF2 rated nado. Cant believe so much debris in sky!


Offline Michael Thomas

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Re: NSW Coastal Rain Event (incl Lennox Head tornado) : 2-5 June 2010
« Reply #22 on: 07 June 2010, 10:21:18 AM »
Hi John,

Thanks, that clears things up very nicely. A bit of misunderstanding on my part. Might have to read about Mesoscale Convective Vortexes because honestly I know nothing about these.

Michael

Offline Jimmy Deguara

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Re: NSW Coastal Rain Event (incl Lennox Head tornado) : 2-5 June 2010
« Reply #23 on: 11 June 2010, 02:42:31 AM »
Hi,

Me thinks that the damage looks high end F1 low end F2 damage. You look closely at the damage, large less supported roofs as well as regions where verandahs allowing for leverage of front structures.

I don't believe this to be your atypical waterspout making landfall - it looks to have had a mesocyclone and merely by its behaviour of a tight vortex.

There was a similar type scenario a few years back where a tornado touched down over water and remained there off Newcastle, NSW and in the same shot, another waterspout was observed. You could see the difference in vortex structure.

Anyway, very interesting debris in the footage clearly shot by somoene in position other than a chaser. Not bad for early in the morning.

Regards,

Jimmy Deguara
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Offline Mathew Townsend

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Re: NSW Coastal Rain Event (incl Lennox Head tornado) : 2-5 June 2010
« Reply #24 on: 11 June 2010, 10:28:55 AM »
Lennox Head needs help

Offline enak_12

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Re: NSW Coastal Rain Event (incl Lennox Head tornado) : 2-5 June 2010
« Reply #25 on: 11 June 2010, 12:55:27 PM »
Hi guys this was quite an event! I got sent some photos from my girlfriend who was sent them by a friend of her dads. Im not sure if this guy took the photos or not but I wanted to post them as I havent seen them anywhere else online. They seem to show a clear slot and satelite tornado.

Note these photos aren't mine..