Author Topic: VIC/NSW Severe Thunderstorms 27 - 28 February 2010  (Read 10753 times)

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Offline John Allen

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VIC/NSW Severe Thunderstorms 27 - 28 February 2010
« on: 28 February 2010, 11:48:22 AM »
Just had some very interesting observations from a chasing friend in North central Victoria, heres the radar loop from this morning to late this afternoon for Yarrawonga.

See :
See : 256km Radar Loop for Yarrawonga, 23:00 26/02/2010 to 09:00 27/02/2010 UTC


Obvious left mover formed near Heathcote, dies on Kyabrum. Very nice flying eagle structure, and very strong returns and good doppler returns for the later stage.

A right mover has formed to the west and is moving to the SE, its a split from the left mover moving N, west of Echuca.

Will continue to update.
« Last Edit: 28 February 2010, 03:58:44 PM by John Allen »
Explosive events coming to a weather system near you.

Offline Brad Hannon

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RE: VIC/NSW Severe Thunderstorms 27 - 28 February 2010
« Reply #1 on: 28 February 2010, 03:28:19 PM »
Impressive reports and pics coming in for this arvo's storms in the North Central region of the state.  Check out the pics from Rikki Pool at the top of pg14 - simply awesome  :evil: .  He is having one helluva season thats for sure!

http://www.theaustralianweatherforum.com/forum/viewtopic.php?f=16&t=206&p=9407#p9407

Update: Reports confirming tornado from this storm - video and photos taken but yet to be posted.
« Last Edit: 28 February 2010, 03:44:19 PM by Brad Hannon »
hmmm June 2nd......

Offline Michael Thomas

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RE: VIC/NSW Severe Thunderstorms 27 - 28 February 2010
« Reply #2 on: 28 February 2010, 05:03:29 PM »
Fantastic photos on that forum! Probably some of the best supercell structure I have seen this season. Really text book structure. The left mover was certainly the storm of the day. Interested about the tornado reports, looking forward to seeing the video. I don't find it hard to believe that the left mover produced a tornado based on what I have seen. As seen by the radar, the storm was a sharp left mover with no competition from other storms. Having a look at the surface obs, it seems that dew points were in the high teens (17-19C) with temps in the mid-20's so the LCL shouldn't of been too high. Finally, the photos show excellent structure. The earlier photos show what I believe is the RFD cutting in behind the base (4th photo is the best example). The last several photos then show a wall cloud almost scrapping the ground and you can see quite a bit of precipitation in the RFD making up what would have been a nice hook echo.

That is what I make it anyway. Others on this forum have far better knowledge than I do.

Michael

Offline Richary

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RE: VIC/NSW Severe Thunderstorms 27 - 28 February 2010
« Reply #3 on: 28 February 2010, 06:06:53 PM »
I noticed this storm on the radar as well. The Doppler wind plots from Yarrawonga certainly looked very interesting, I think it was the 0522 one that while showing most of the wind heading towards the radar had a very strong yellow spot right at the western edge of the storm that was west of Shepparton so certainly in the area. Rainfall intensity was very strong as well. It would be interesting to see some of the experts look at the doppler wind plots of this one.

Offline Brad Hannon

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RE: VIC/NSW Severe Thunderstorms 27 - 28 February 2010
« Reply #4 on: 28 February 2010, 06:38:50 PM »
It would be interesting to see some of the experts look at the doppler wind plots of this one.

Hi, I was hoping for some feedback/thoughts on exactly the same issue from the Avenel storm of 2 weeks ago which actually had 2 red returns on doppler wind!  ;)
hmmm June 2nd......

Offline James

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RE: VIC/NSW Severe Thunderstorms 27 - 28 February 2010
« Reply #5 on: 01 March 2010, 04:06:37 AM »
Wow! Now they are some impressive photos with some great classic supercell structure. Agree with MT, the photos show a classic example of a RFD (and clear slot). Probably up there as some of best storm structure photos I have seen from Australia this year. Head back home tonight so will have a look through radar and obs later.

Offline scottme

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RE: VIC/NSW Severe Thunderstorms 27 - 28 February 2010
« Reply #6 on: 01 March 2010, 08:41:43 AM »
There is a suspicious looking cell moving through Camden in Sydney now that is starting to show a v shape - possible supercell? Severe warning has just been issued at 14:32. A cell just exploded over Warragamba just to the northwest flank of the above storm.

The odd thing is, I can't really see much from in front due to the mist.

Offline Harley Pearman

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RE: VIC/NSW Severe Thunderstorms 27 - 28 February 2010
« Reply #7 on: 01 March 2010, 11:46:06 AM »
Some photos of the Sydney storm 28 February 2010

Below attached are three photos of the Sydney Storm. I am at Blacktown on Bungarribee Road. The storm moved in from the south west producing an interesting shelf cloud as well as new updraft towers and cloud formations.

As the shelf cloud passed over, a strong south to south west wind ensured for a period of time before easing. While interesting cloud formations were observed and photographed, no damaging weather occurred. The storm system did produce two bursts of light to moderate showers and thunder was audible for a period of time before waning.

Harley Pearman

Offline vrondes

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Re: VIC/NSW Severe Thunderstorms 27 - 28 February 2010
« Reply #8 on: 01 March 2010, 03:37:06 PM »
Good to see you get some captures of the leading edge of that storm this afternoon Harley. The underbelly of that shelf cloud displayed
some dramatic whalemouth features when I went out to a Golf driving range near Cowpasture rd and Horsley drive around 3pm.
. Nice dark clouds with filtered light coming through before rain and  cloud to cloud lightning with the odd cg took over.
Cheers, Con.






Offline Richary

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Re: VIC/NSW Severe Thunderstorms 27 - 28 February 2010
« Reply #9 on: 01 March 2010, 04:21:58 PM »
You guys a bit further west certainly got a better view of it than I did at Rydalmere. I had been up to Wyong during the day and on the drive home about 2pm could see some thunderheads way down to the south trying to be visible through the lower layers of clouds that generally blocked views from home.

As the storms were heading around Camden things were looking promising enough for me to set the lightning trigger up on the camera but after about Oatley it all seemed to fall apart in intensity. We ended up with a bit of thunder, 2 visible bolts and 6mm of rain. The shelf cloud was falling apart by the time it hit here with lots of outflow scud.

On other storms, the lower Blue Mountains looked like it might have copped a nice left mover, another formed near Bilpin later. There was also one near Mangrove Mountain that caused a severe alert for the Hunter but fell apart shortly after. And another one down south near Point Perpendicular that from the radar images I am surprised didn't get a severe warning with a nasty deep red line in it for a while.

Offline Harley Pearman

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Re: VIC/NSW Severe Thunderstorms 27 - 28 February 2010
« Reply #10 on: 02 March 2010, 12:51:53 AM »
Possible Funnel cloud photo (Blacktown 28/10/2010)

Further to my earlier post while watching the shelf cloud pass overhead, I captured this image attached. A new updraft tower seemed to develop just to my north. When watching it, I noted a formation under its base and it appears to be a funnel cloud however I seek clarification. However, I would be most happy to receive any comments on this. This formation lasted no more than 20 seconds and I watched it dissipate quite rapidly.

The photo is taken on a reserve off Bungarribee Road Blacktown and I am looking north although I have focused in on the subject. While it was projecting below the cloud I must stress it did not extend any lower. The subject is centre of the photo and I took every effort to ensure I placed the subjet to the centre for best viewing.


Harley Pearman

Offline Jimmy Deguara

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Re: VIC/NSW Severe Thunderstorms 27 - 28 February 2010
« Reply #11 on: 02 March 2010, 11:30:01 AM »
Hi Harley,

If I am mot mistaken, that is a base funnel - hard to tell but these are not too uncommon with rapid developing updrafts. Well spotted.

Regards,

Jimmy Deguara
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Offline pingtang

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Re: VIC/NSW Severe Thunderstorms 27 - 28 February 2010
« Reply #12 on: 02 March 2010, 12:08:33 PM »
My friend Andrew got onto a severe storm on the southern outskits of Nowra yesterday afternoon. There was plenty of leaf litter in a very localised area thanks to the 3-4cm hail. Strong winds and torrential rain were also a feature of this storm,with gusts of 87km/h and 2.4mms falling in a minute. The storm weakened somewhat as it crossed Nowra, but it somehow made it Gerringong but in a more elevated state. The storm had quite a strong base with nice inflow. A very nice storm!!!! Heres the link to the footage.

severestormnowra.wmv

Offline Jimmy Deguara

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Re: VIC/NSW Severe Thunderstorms 27 - 28 February 2010
« Reply #13 on: 02 March 2010, 11:55:46 PM »
Hi,

Andrew that is a nice cell - enjoyed the hailstones as well. I wished you had shown just a touch more timelapse of the base to see what was happening overall. I think you would need to have been a little more distant to get some perspective of what was happening to the structure. Love the hailstones though! Good storm event.

Regards,

Jimmy Deguara
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