Storm Australian Severe Weather Forum

Severe Weather Discussion => Australian Severe Storms, Weather Events and Storm Chasing => Topic started by: David C on 31 January 2008, 06:37:05 AM

Title: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: David C on 31 January 2008, 06:37:05 AM
Things are primed for rather explosive development during the afternoon along the ranges south of Sydney. Deep layer wind fields are on the marginal side however I would not rule out the odd supercell today particularly the further south one goes -- definitely worth a chase. I will pin my hopes on getting out of here by 4:00pm and a late start to a sustained storm across Sydney's south west outskirts, which together = unlikely.

Have fun!
Title: RE: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: Michael Bath on 31 January 2008, 09:38:33 AM
A couple of comments posted by Harald Richter of BoM earlier...


Quote
If you have the luxury (and inclination) of monitoring convection in
Australia, the SE
corner of NSW has begun to produce.  A leftmover is plowing through
Michelago
(50 km S of Canberra).  A second significant storm is struggling against
the cap
W of Cobargo in an otherwise potent supercell environment.   

Harald  (30 Jan 08, 3z or 2pm EDT)


and...


Quote
The dominant Michelago supercell seems to have gone up on the
boundary between a 32/13 NW parcel and more easterly flow to
the south.  As such cold outflow might threaten its survival in the
medium
to longer term. It did sport a hook-like appendage on the NW flank, a
pronounced forward flank V-notch and echo overhang on the N flank.

A better storm environment, apart from a strong cap, offers the 30/21
Bega parcel of the South Coastal plains.  If a storm, such as the
currently (3:50z) severe core W of Bodalla, can capitalise on that
parcel, we might see something bigger yet...

Harald (3:50z or 2:50pm EDT)




Title: RE: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: Shaun Galman on 31 January 2008, 11:31:33 AM
Hi guys (it's surely been a while, but very glad to back posting!)

The radar and LT are looking superb today for anywhere in a line south of Cobar! Sydney is in the firing line yet again by the looks and I cant wait to see some great storm reports and photos from today's events!

It looks like the chances for my area, Upper Western, are increasing from tomorrow onwards through the rest of this week? We have one nice looking cell sitting to our south, out towards Walgett, with a nice backsheared (or backshorn) anvil and flanking line, that is about all I can see from this far away.

Best of luck to all who are out chasing today, take care if your amongst the masses of lightning activity! (wish I was there with you lol!)

Cheers and regards,
Shauno
Title: RE: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: David C on 31 January 2008, 11:37:36 AM
check out Canberra radar - a large storm, probably HP (Jarrel Tx style propogating NW!).
You would expect this storm to run into stable air; ie rain-cooled air from earlier convection and also it will loose out on insolation due to the enormous anvils of storms in progress to the NW - ie it probably wont last too much longer, but would surely be an impressive sight out there for anyone in no-mans's land.
Title: RE: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: Richary on 31 January 2008, 11:50:09 AM
That storm currently north of Braidwood looks pretty intense and over a reasonable size area. Have a look at the Canberra radar loop between 0600-0630.

Unluckily the Sydney ones are all dying as soon as they leave the mountains. A fair bit of activity up there but as soon as it hits the plains nothing. Just had a rumble of thunder here near Parramatta but nothing on the radar. Just hot and sticky here :-(
Title: RE: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: Jimmy Deguara on 31 January 2008, 11:53:06 AM
Hi,

I headed out today but the chase was riddled with mishaps so I consequently turned back.

I aimed for the Marulan region but hit the traffic due to stupid "daytime" road works - resurfacing. That wasted 20 minutes and got me onto a decaying storm. I turned around and aimed for a possibility of the activity at Lithgow. It also looked spent and the traffic lined up ahead of me made the trip really not worth the effort. So I headed back home.

Here are a couple of pictures:

Mittagong
(http://www.australiasevereweather.com/photography/photos/2008/0130jd07.jpg)

Back home:
(http://www.australiasevereweather.com/photography/photos/2008/0130jd11.jpg)

It seems like the storm intensities are abating - widespread activity.

Regards,

Jimmy Deguara

Title: RE: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: wol on 31 January 2008, 12:06:31 PM
Some nice mammatus cloud over Blacktown around 4:30pm. 
Sorry about the quality, my phone is all I had with me while riding home on the motorbike.

Been watching the radar but it all seems to be fizzing out.

(http://img295.imageshack.us/img295/940/mammatusqp7.jpg)
Title: RE: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: Peter J on 31 January 2008, 12:49:08 PM
Hi All,

Glad for me to be back at work, even though it was a humid and warm-to-hot day in Nunawading (Eastern Melbourne). As of 6.28pm, a severe thunderstorm warning was issued by the BoM for large hail, flash flooding, and damaging winds for the Alpine region, the North East region, and the East Gippsland region.
I believe the situation in these areas of the ranges will probably harbour the same sorts of storms that the ranges in NSW and ACT have been experiencing. My older brother lives in Wodonga, and normally he lets me know about weather in his region, but he's out of contact at the moment. It is his area that has part of the warning for tonight. Hopefully, he can report to me about what the storms are doing in his part of the world, so I can relay to all who are interested. NE Melbourne has had no rain, but it is sticky and humid here. Storms are not clearly visible tonight due to the hazy cloud lingering - unfortunately, there is only a tiny bit of a small anvil showing through the haze - not enough to get a decent pic.

Happy hunting

Big Pete
Title: RE: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: Harley Pearman on 31 January 2008, 02:37:54 PM
Hello

The storm near Braidwood storm looked intense. I was watching numerous radar loops of it from 3 pm to 5 pm and it seemed to wax and wane over a period of two hours, at least while I was watching it. It was not moving fast but I noted that it was warned of large hail, very heavy rain and damaging wind.

Interestingly on one radar image, the storm was structured so that the most intense portion was oriented NW (facing to the Earths equator) while the lighter rain shield was oriented to the SE (towards the Earth's south pole), suggesting that this storm was well organised for a while.

Harley Pearman

Title: RE: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: Ursula on 31 January 2008, 02:53:42 PM
Hi there,

there is a severe storm heading most likely 'just' south of where I am, my daughter said the lightening is severe about 20km south of where I am, and thunder is rolling, so I am off, put my plants in the nice pots out of harms way

I missed the earlier on in Michelago, it went south to the coast from here.
Title: RE: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: Dave Nelson on 31 January 2008, 02:55:21 PM
Hi all,
          excellent afternoon chase to the mountains after finishing my last job.

initially there were 3 cells I observed going up over the mountains early afternoon.
the nthrn most one was the largest. But during my trip up into the mnts. a 4th cell
went up on the nth side of the large nthrn most cell

  Got to Mt Piddington lookout ( a few km b4 Mt Victoria) ~ 3pm in time to settle in
and await the onslaught. At the time of my arrival there, the storm cell was still
~ 10 - 15k to the west and was electrically very active with many strobing CG's and
also many embedded flashes.

There was a good green colour to the cell   and eventually the gustfront arrived with
gusty wind rain and some hail

Also photo'ed that nice mammatus on the way up through Faulconbridge area.


Cheers
Dave N

Title: RE: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: Michael Bath on 01 February 2008, 01:20:34 AM
Cobar received up to 102mm from overnight storms including 46mm in one hour according to the current severe thunderstorm warning.

Were certainly a few impressive cells on radar yesterday in Southeast NSW yesterday.

There were storms in the Northern Rivers yesterday but pathetic weak things bunching up against the ranges in a slack easterly steering flow.


Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: James on 01 February 2008, 02:39:35 AM
Today should be big! BOM sounding over Sydney this morning had LI's of -9 with what looks to be some impressive CAPE (3000+ guestimate) great for explosive updrafts! Looks like there may be some wind shear this afternoon which should make for some longer lasting storms and possible organisation. Tops should reach 40,000+ on the bigger cells too.

Add to that a southerly moving up the coast during the afternoon.... the possibilities are very interesting!
Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: Jimmy Deguara on 01 February 2008, 10:37:26 AM
Hi James,

What a sultry day it was today or should I say still is at this time. A major storm has exploded near Wollongong and backbuilding activity stretches in a line west of Oakdale. Another line is approaching slowly from western parts of the Central Tablelands.

Regards,

Jimmy Deguara
Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: scottme on 01 February 2008, 12:22:37 PM
I can see the base of a storm with quite strong inflow moving over Canterbury right now out my back window (18:30). Looks like a bit of a left mover on radar. Lots of CG lightning.
Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: Richary on 01 February 2008, 12:35:55 PM
From here at Rydalmere the storm near Bankstown Airport is building quite nicely, with lots of lightning. Not a real good view from here so far with a low hill immediately to my south (Victoria Road), but I think it will come over quite strong soon. Lots of rumbles from the south now and still strong SE winds. Might finally cool it down a bit at night!
Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: David C on 01 February 2008, 12:41:07 PM
Storm currently going through Padstow at the moment. Very lightning active and good steady rain here. We did not got any winds of note although a 95km/h gust was recorded some 10km west of here. It was nice to see those cells fire up along a gustfront put out by the storms over the outer southern suburbs.

Must say that is an interesting base reflectivity scan just come through (7:30UTC). Let's see the subsequent scan
Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: Richary on 01 February 2008, 12:54:55 PM
6:54pm Just starting to get hail here between pea and marble size, and the lightning is getting nice and close!

7:15pm The main band has passed over, giving us 8mm in 20 minutes. Looking at the radar the heaviest part was east of here, for example Olympic Park has had 16mm so far. Some nice lightning which I tried videoing until it got too windy and was blowing the rain towards the camera.

Seems to be exhibiting strong outflow, with the rain/wind coming initially from the SE and now from the NE as the storm moves towards Gordon. Unfortunately that meant whatever side of the house the storm was on, the rain was blowing in from that way as well making taking shots harder.
Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: scottme on 01 February 2008, 01:23:36 PM
Wow, looks like that outflow has become inflow on a storm that sprung up over just west of Paramatta.
Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: Richary on 01 February 2008, 01:33:36 PM
I noticed that new one spring up out of nowhere. Unluckily it has tracked too far NW to get a good view. One of the Bankstown area small ones looks like it might be getting a left hand movement and heading this way.
Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: jennifer barnard on 01 February 2008, 02:58:27 PM
Hi All,
Yes my first post after spending a fair amount of time reading the posts and looking at the photos. Great photos lately Mike! but also compliments to everyone else too!

I'm writing this post about the storm that passed over us here at Quakers Hill probably about an hour ago now. My husband and our neighbour have been here for many years and they say this was the worst they have seen in terms of the amount of rain that fell! We had water coming in three window areas, through the garage and our new carpet is wet in the main bedroom - all of the windows were closed (of course). We had I suppose you would say moderate hail  but only small in size but enough to clog the gutters. We can see to the west from our front door and we could barely see across the road. The runoff was too much for the storm water drains and the road became flooded (and we live on the high side of Quakers Hill). I'm sure low lying areas were hit hard.

More lightning and thunder as I write.

Hope all chasers are safe and there has been minimal damage

Cheers

Jen
Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: Michael Thompson on 01 February 2008, 03:52:58 PM
31st January 2008 - Storm chase , Wollongong to Holsworthy

  All photos clickable
 

Quite a productive after work storm chase this afternoon, but a case of I wished I had the video camera.

I initially headed south from Wollongong, but quickly backtracked as the Shellharbour stuff become rather outflow dominated.

Watched from Wollongong harbour as new development occurred just over the escarpment.

You can tell the fresh development by the green.

    (http://ozthunder.com/chase/310108a_t.jpg) (http://ozthunder.com/chase/310108a.jpg)

I headed north along the coast road. Around Bellambi the sky just cut loose with torrential rain and hail, but it was the lightning that was the main feature, close CG's one after the other.A full on barrage.

Here is some of the hail near Woonona, 2cn., perhaps the odd 3cm stone. There was major flash flooding and small tree branches down.

(http://ozthunder.com/chase/310108b_t.jpg) (http://ozthunder.com/chase/310108b.jpg)

I headed north determined to get ahead of the outflowed fueled northward propagating cell.

Views are poor in Sydney's far south. Here is the Wollongong cell weakening

(http://ozthunder.com/chase/310108c_t.jpg) (http://ozthunder.com/chase/310108c.jpg)

As I was watching this I had storm chaser convergance with James, we speculated on the rather   semi interesting development to the west. We noted a few CG's apparently well ahead of thr rain core, so I decided that the Heathcothe Road was worth a trip.

Along the Heathcothe road and it became apparent that a better cell was organising SW of Liverpool.

It had some interesting structure !

(http://ozthunder.com/chase/310108pan_t.jpg) (http://ozthunder.com/chase/310108pan.jpg)

I knew that with higher surface temperatures over Liverpool compared to the coast that microburst activity may be a feature.

The photos do not do justice to the winds, and a second grand CG barrage for the day.

(http://ozthunder.com/chase/310108d_t.jpg) (http://ozthunder.com/chase/310108d.jpg)

Near Moorebank ( I think ) my chase ended with a tree over the road. I was the second car blocked by the tree, it fell whilst I was at traffic lights 30m back up the road.

(http://ozthunder.com/chase/310108e_t.jpg) (http://ozthunder.com/chase/310108e.jpg)

All in all a fantastic trip, but video would have been a killer.
Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: James on 01 February 2008, 05:03:00 PM
Had a brief successful chase this afternoon starting at Campbelltown and nearly doing a loop down to Picton/Appin/Bulli/Waterfall/Holsworthy and then back up to Galston.

Watched the earlier cells near wollongong go nuts from near Campbelltown. The NW flanking line started to get its act together with some crisp powerful updrafts however the bases were still quite high at this point. I opted for the coastal show at the start knowing the lightning and features were much better.

  (http://sydneystormchasers.com/system/files/images/08-01-31-01jh.preview.jpg) (http://sydneystormchasers.com/system/files/images/08-01-31-01jh.jpg) 

  (http://sydneystormchasers.com/system/files/images/08-01-31-04jh.preview.jpg) (http://sydneystormchasers.com/system/files/images/08-01-31-04jh.jpg) 

Those cells had some very intense, frequent lightning for quite a while until it started to gust out and the focus turned to the new cells developing on the earlier storms outflow.

Chaser convergence with Michael T was a nice surprise and as Michael said, we both agreed that the cells to the west were starting to become nice and organised. After dodging a few close flangs I headed up Heathcote rd to Holsworthy where a strong rippled base had developed and was ready to let loose a barrage of cg's, rain, hail and wind.

  (http://sydneystormchasers.com/system/files/images/08-01-31-05jh.preview.jpg) (http://sydneystormchasers.com/system/files/images/08-01-31-05jh.jpg)   

  (http://sydneystormchasers.com/system/files/images/08-01-31-06jh.preview.jpg) (http://sydneystormchasers.com/system/files/images/08-01-31-06jh.jpg)   
 
The wind was intense in bursts with branches coming down around my location. Hail was small however the lightning was frequent and constantly pounding all around. Heavy rain gave some flash flooding and it wasn't long before I was stopped by a tree across the road (I have a feeling its the same tree as your photo MT - I would have been around 6 cars back. I managed to get around it by driving onto the footpath behind a 4wd). After getting past this blockage I managed a awesome view of the back end structure a I headed north on the M7 back home.
 
  (http://sydneystormchasers.com/system/files/images/08-01-31-07jh.preview.jpg) (http://sydneystormchasers.com/system/files/images/08-01-31-07jh.jpg)   

  (http://sydneystormchasers.com/system/files/images/08-01-31-09jh.preview.jpg) (http://sydneystormchasers.com/system/files/images/08-01-31-09jh.jpg)   

Before turning onto Galston Rd I stopped at the Dural lookout and watched the beginning of the big cell over NW Sydney around 7pm

  (http://sydneystormchasers.com/system/files/images/08-01-31-10jh.preview.jpg) (http://sydneystormchasers.com/system/files/images/08-01-31-10jh.jpg)
Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: Michael Thompson on 01 February 2008, 05:29:31 PM
Yes James that would have been the same tree as I too had to do the drive down the the bike track. Glad you went the Heathcothe Road option.
Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: Richary on 01 February 2008, 06:05:38 PM
Didn't go chasing here, but yes it was interesting how it developed. Ignoring the earlier stoms that caused a few accidents around Wollongong, the main one that tracked east of Parramatta (and I got the edge of at Rydalmere) had significant outflow that seemed to spark another storm west of Parramatta. That one went on to the north and from the radar images got quite intense up towards Glenorie (Black centre on the image).

Interesting how the 2nd Parramatta storm developed very quickly, and seemed to at the same time suck the life out of the first one which petered out just NE of Gordon.

The 2nd line of storms up here were mostly intra-cloud lightning, compared to the first one which had lots of multiple CGs and crawlers. Had a bit more briefly heavy rain though, the one that came through here had developed and split off the line near Bankstown before hanging a left and coming over this way.
Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: Jimmy Deguara on 02 February 2008, 01:38:40 AM
Hi all and Jennifer,

Report of the severe storm event 31st January 2008

Living at Schofields, it is great to note the slight difference between the duration and intensity of the storms.

Schofields was hammered by the same storm hitting Quakers Hill - apparently Rune who also lives at Quakers Hill reported 48mm in 30 minutes - very intense rainfall rates. We had a total of 47.8mm including a little more rainfall later in the night.

The difference is we had power failure that took all night to rectify. The cloud to ground lightning was quite intense but the winds were very powerful tossing a lot of the items around. We also had hail dumping for about 5 minutes. I was able to capture the microburst and hail. The winds swung around and I had to close an upstairs window and when I returned the winds had sprayed both my cameras with the digital still on the ground! So the winds had begun from the south and then veered from the west.

Anyway, that was one intense storm. It seemed to develop just to our south and southwest. despite an outflow area and associated shelf cloud moving through earlier, the development of this cell was behind that outflow and and elevated above the boundary layer. The winds at the base seem to come from the north feeding into the developing storm. As soon as precipitation began to develop to our south probably Quakers Hill area, the lightning barrage began and intensified. The rain became more intense and at one stage I could hear the roar of heavy rain about half a kilometre away. But it still took sometime to for this to finally arrive. Slow moving means flash flooding.

Anyway, a good way to end January. Photoraphs to follow below.

Regards,

Jimmy Deguara
Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: David C on 02 February 2008, 04:25:17 AM
Anyway, that was one intense storm. It seemed to develop just to our south and southwest. despite an outflow area and associated shelf cloud moving through earlier, the development of this cell was behind that outflow and and elevated above the boundary layer.
Regards,

Jimmy Deguara


Hi Jimmy the 1st 'main' storm that moved across the metro area appeared to develop along an old gustfront, put out by the storm(s) further south over Wollondily etc -- the outflow itself was marked by a shelf cloud that became detached and moved out way ahead of the rain core of the weakening storm and soon developed into rapidly growing cumulus. There was some really nice dynamic cloud-base motion and powerful bolts as the northeast winds and the outflow converged over the southwest suburbs (as per Michael's and James' images above of Holsworthy area).
Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: Shaun Galman on 02 February 2008, 10:44:33 AM
Hi all,
Great chase/report on the Sydney storm/s guys!

31st Jan. 2008 Upper Western/North West Area, Storm Report & Photos

We had quite a mixed day here yesterday, kicking off with a storm forming over Cumborah (30-odd k's SW of Lightning Ridge) that I noticed on radar along with plenty of lightning activity. I went out for a look and straight away noticed the large anvil that was showing on the sat. pics. The panorama below is looking SW from town at the storm, I took this from our airport at 4:25pm.
(http://www.ridgelightning.com/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=1789&g2_serialNumber=1)

Across the afternoon we got buried in a large anvil shield forming from numerous towering updrafts that would soon collapse into nice little cells, some showing nice CG activity here and there. The cell below had the nicest structure of the arvo. Taken 15k's North of town around 5pm this cell also had the odd CG branching from the rear base (right side of the photo). It seemed like there were up to 10 or 12 small rain cores around us at any one point, most threw down the odd CG or two.
(http://www.ridgelightning.com/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=1796&g2_serialNumber=1)

After returning home from getting a few shots of the surrounding cells, I did notice a rather large and ominous looking rain core forming to our South at 6pm, while watching it for only a few seconds, close CG started firing down so I raced to the southern edge of town for a better view! I was only there momentarily when the dreaded rain started sprinkling (as you can see from the rain spots on photo) creating EXTREMELY dangerous conditions for photography as there were CG firing down 360 around me, time to bid a hasty retreat to the ute! The photo below (taken at 6pm) was the only CG I managed for the arvo as it was just too dangerous guys. No real structure to be seen just a grey looking HP rain shaft with a ridiculous amount of atmospheric charge!
(http://www.ridgelightning.com/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=1802&g2_serialNumber=1)

Rain totals were only 5mm in town from a shower last night. The sparseness of the cells didn't help totals either but I would imagine falls would have registered in the 10-20mm per hour range in some of them.
Cheers and take care.
Shauno.

A few storms about the place today once again so I'll see what eventuates tonight. I'd love one of these highly active storms to approach town during darkness, as they used to many eons ago! lol ;)
Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: Jimmy Deguara on 02 February 2008, 12:45:18 PM
Photographs 31st January 2008 Severe Thunderstorm event

All from home given I did not bother chasing

This is the northern edge of the storm developing over the southwestern suburbs
(http://www.australiasevereweather.com/photography/photos/2008/0131jd02.jpg)

Associated upfraft exposed
(http://www.australiasevereweather.com/photography/photos/2008/0131jd05.jpg)

Dust rising from a building site below the developing base
(http://www.australiasevereweather.com/photography/photos/2008/0131jd06.jpg)

The Schofields/Quakers Hill cell developing base
(http://www.australiasevereweather.com/photography/photos/2008/0131jd13.jpg)

On of the many daytime lightning bolts
(http://www.australiasevereweather.com/photography/photos/2008/0131jd16.jpg)

Hailstones falling in the core of the thunderstorm - the winds were still battering in gusts
(http://www.australiasevereweather.com/photography/photos/2008/0131jd29.jpg)

Full set of pictures available here:
http://australiasevereweather.com/photography/photos/2008/jd20080131.html

Regards,

Jimmy Deguara
Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: Harley Pearman on 02 February 2008, 03:17:27 PM
Storm report Thursday 31 January 2008

I was watching the Wollongong storm on various radars for a while and recognised the outflow boundary NW of it and the presence of the southerly change. I did some mathematics and calculations on it and figured that I only needed to travel 2 km west of where I work to score a direct hit on a storm cell.

I went to Duck River Parklands near Mona Street Auburn for a prime spot and watched the storm over Wollongong however, I watched and photographed a new storm cell to my SW that intensified rapidly around 6 pm and with it came a barrage of cloud to ground lightning bolts.

It headed in my direction but better still, the North west portion of the storm cell headed in my direction and I knew my mathematics had paid off.

The storm at my location started with intense drizzle blowing sideways in gales blowing from a southerly quarter. Leaves and bark were being stripped from trees from the down bursts for a while. Then came a solid barrage of rain and then hail up to 1.5 CM in size (I managed to estimate the size of some stones that fell near me). As the core passed directly over me, I found myself in some trouble. I was under a small shelter but soon found myself walking in water up to 10 CM deep. The playing fields in front of me quickly became flooded and I effectively experienced some flooding due to the amount and intensity of rain falling.

A solid bolt of lightning hit an object very close to me (I think the Auburn Council sign post nearby to my north). I could smell the burning of an object immediately afterwards and it was a very close strike.

Amazingly, I experienced another significant downburst at the rear of the storm and winds were blowing from a NE direction this time coupled with torrential bursts of rain. The storm was obviously dumping rain at this stage.

The decision to catch the north west portion of the storm proved to be fruitful, given that I witnessed some tree damage, power loss, hail, significant lightning and flooding.

Rosnay Golf Course nearest to me and Mona Street Auburn, 1 km to the south with a weather station recorded 34 mm of rain from that storm indicating that the rainfall at my position would have been in the vicinity of that figure.

I drove through another rainstorm on my way home but the rain was not as heavy as the Auburn event and I did not experience any further hail.

The whole Thursday event produced some solid rainfalls in parts of Sydney such as:-

Auburn (Varied between 39 mm and 47 mm).
Seven Hills 22 mm.
A suburb near Hornsby close to Turramurra recorded 71 mm being the highest figure.

The highest rain falls occurred in a line from Liverpool NE towards Hornsby through Auburn and anyone in this corridor such as myself would have experienced a significant storm event with local flash flooding. Numerous traffic lights, local power failures featured around Auburn and Granville following the storm and up to 17,000 homes were blacked out for a while.

Harley Pearman
Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: nmoir on 03 February 2008, 03:44:34 AM
(thursday arvo 31st jan)As the line moved NE it intesified over the central sth west suburbs , this shows lowering which lasted 10 minutes (that i could see) , i was not chasing and had no mobile as it had suffered from a rare microburst which occurred between my arm and the concrete the day before and ended in the phone dispursing itself over a wide terrain after a disageement with partner over my choice of chasing days.

Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: Shaun Galman on 03 February 2008, 07:02:19 AM
G'day all,

Nice to see some great structures around the place (well, from the Sydney region anyway? ;) ) I'd give my right arm to see some decent build structure in the way of an inflow shelf or a nice RFB at the moment! I think the wind shear is still too weak and possibly something amiss in the temperature/DP department out this way?

Looks like the storms will be around for a couple more days so I'm praying for something a little different in the numbers to show up.
Cheers guys,
Shauno
Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: vrondes on 03 February 2008, 11:20:28 AM
Severe storm  over Sydney 31-01-2008,
Around 6.30 pm I noticed a decent base developing over South Parramatta  so I decided to head down to the local park . Upon arriving I was greeted by a dynamic rippled rain free base with the precipitation curtain advancing  from the south. Cgs could be seen and definitely heard to the leftof the very low rfb. Deciding to get a better vantage point to photograph the advancing front from the eastward facing side of the park  some greenage was seen. Inflow scud heralded some quite close cgs from a higher cloud base. The roar of approaching rain on factory rooves plus cgs spread out over a 180 degree front meant the car was the only safe haven. No photographs of cgs were captured, only some dramatic base structure which hopefully I can post. Cheers, Con.


Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: vrondes on 03 February 2008, 02:18:51 PM
Photos from 31-01-08 Sydney storm.
(http://i172.photobucket.com/albums/w28/elenecon/Storms%20season%2007-08/0-6.jpg)
Under the developing base
(http://i172.photobucket.com/albums/w28/elenecon/Storms%20season%2007-08/0-5.jpg)
Rippled base
(http://i172.photobucket.com/albums/w28/elenecon/Storms%20season%2007-08/0-4.jpg)
Cheers, Con
Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: Richary on 03 February 2008, 03:56:58 PM
Interestingly enough, here at Rydalmere I had a lot of outflow scud heading away from the storm at high speed before the main band came over. The main part of the storm travelled to my east through the Ryde area looking at the radar, but as it approached from the south the scud was heading in a NW direction with lots of CGs to the south. A few good ones seen but nothing caught on camera.
Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: Jeff Brislane on 04 February 2008, 10:52:24 AM
Nice close up structure in those photos Con.

Chase Report January 31st Penrith

I didn't venture out earlier but I did shoot photos of the structure from home which I then deleted by accident later on! I went out and shot some lightning after the main cell had moved north. The cell I photographed was riding the southerly in towards Penrith and even though it only produced sporadic lightning, they were quality multiple bolts. Unfortunately I didn't quite have the camera pointed in the right direction so I only got half of the best bolt. Doh!!! >:(
Title: Re: NSW/VIC Severe Storms: 30-31 Jan 2008
Post by: David C on 05 February 2008, 11:57:14 AM
Couple of video stills from the balcony: All looking south-west.

(http://www.thunderbolttours.com/stills_au_08/20080131_01.jpg)

(http://www.thunderbolttours.com/stills_au_08/20080131_05.jpg)

(http://www.thunderbolttours.com/stills_au_08/20080131_09.jpg)

(http://www.thunderbolttours.com/stills_au_08/20080131_10.jpg)