Author Topic: NSW Severe Storms 6 Jan 2006  (Read 11374 times)

0 Members and 1 Guest are viewing this topic.

Offline Jimmy Deguara

  • Australian and Tornado Alley storm chaser
  • Administrator
  • Wedge tornado F5
  • *
  • Posts: 2,218
  • Gender: Male
  • Storm Chaser since 1993, Tornado Alley 2001
    • Australia Severe Weather
RE: NSW Severe Storms 6 Jan 2006
« Reply #15 on: 09 January 2006, 03:48:12 PM »
Hi Michael,

I take it the storm was evolving into a line - are you suggesting a bowing of r the storm and perhaps a book-end vortice? The "rotation" you suggest would be consistent as anticyclonic then.

Regards,

Jimmy Deguara
-------------------------------------
Australian Severe Weather
www.australiasevereweather.com

Australian Thunderbolt Tours
www.thunderbolttours.com

Phone  0408 020468  (International :  61  2  408 020468)

Offline Michael Bath

  • storm chaser
  • Administrator
  • Wedge tornado F5
  • *
  • Posts: 1,602
  • Gender: Male
    • Australian Severe Weather
RE: NSW Severe Storms 6 Jan 2006
« Reply #16 on: 10 January 2006, 02:53:54 AM »
Hi Jimmy,

Not a line with this storm but some other cells developed closely west of it. There was a line of activity later on.   I do not recall inflow at our observation point on the Mallanaganee lookout.

Did you see the comments by Hararld Richter at the BoM about this storm:

5.30pm

"At 06z a likely supercell near Pretty Gully 115 km NNW of Grafton
sports 50 dBZ to 16 km, outbidding its southern neigbour who produced
50 dBZ to 14 km earlier (a form of one-upmanship among storms, I suppose).
The Pretty Gully storm has a mildly displaced echo on the N flank. 
WDSS (an experimental radar-based algorithm) prints a hail size of 46 mm onto
my screen.

Apart from me being storm-starved, I think the sheer height of the 50 dBZ echoes
is impressive with this event.  Very tall CAPE fed by deep rich
BL moisture seems to be the main driver of this event, but some
moderate deep layer shear has presumably created some updraught
rotation (judged by storm structure, longevity and anomalous motion)."


and at 6.15pm

"Impressive supercell over Malanganee bound for Casino (~40 min) at 7z.  50 dB echo tops remain
very high ( > 14 km) and are generously displaced to the N of the ll core.
A clear pendant echo has developed on the NW flank at low levels.
Hail sizes should be such that clubs can now be exchanged for bats ..."

MB

Location: Mcleans Ridges, NSW Northern Rivers
Australian Severe Weather:   http://australiasevereweather.com/
Lightning Photography:   http://www.lightningphotography.com/
Early Warning Network: http://www.ewn.com.au
Contact: Michael Bath

Offline David C

  • Global Moderator
  • Barrel tornado F4
  • *
  • Posts: 643
  • Gender: Male
    • Thunderbolt Tours Storm Chasing Adventures
RE: NSW Severe Storms 6 Jan 2006
« Reply #17 on: 10 January 2006, 06:01:03 AM »
HI Guys.

Very nice photos!

Michael how does this season rate in your own experience? - from down here it seems to be rather, should I say very active!
Jimmy, looks like Feb 16 2002 all over again from your pics. Was that wall cloud totally undercut or where you seeing rotation?
It did look very impressive on the stock standard PPI scans for a bit :)
 
Storm Chaser,
Thunderbolt Tours - USA & Australia Storm Chase Tours
www.thunderbolttours.com

Offline Michael Bath

  • storm chaser
  • Administrator
  • Wedge tornado F5
  • *
  • Posts: 1,602
  • Gender: Male
    • Australian Severe Weather
RE: NSW Severe Storms 6 Jan 2006
« Reply #18 on: 11 January 2006, 03:53:32 AM »
Hi David - extremely active !   There have now been 60 storm days in the Northern Rivers since 1st September. I've chased all the good days which is roughly 30 chases.  So it is far better than any other season.

MB
Location: Mcleans Ridges, NSW Northern Rivers
Australian Severe Weather:   http://australiasevereweather.com/
Lightning Photography:   http://www.lightningphotography.com/
Early Warning Network: http://www.ewn.com.au
Contact: Michael Bath

Offline Jimmy Deguara

  • Australian and Tornado Alley storm chaser
  • Administrator
  • Wedge tornado F5
  • *
  • Posts: 2,218
  • Gender: Male
  • Storm Chaser since 1993, Tornado Alley 2001
    • Australia Severe Weather
RE: NSW Severe Storms 6 Jan 2006
« Reply #19 on: 12 January 2006, 05:41:33 AM »
Hi Michael and David,

The information from Harald is interesting and it no doubt was a supercell - I was just wandering Michael in terms of the motion you suggested whether the storm was in a bowing out mode.

David the storm structure does look a little like the 16th February 2002. There was very strong southeast winds that fed under the wall cloud. This structure maintained up until at the least the point we were there. I have yet to check the video.

Regards,

Jimmy Deguara
-------------------------------------
Australian Severe Weather
www.australiasevereweather.com

Australian Thunderbolt Tours
www.thunderbolttours.com

Phone  0408 020468  (International :  61  2  408 020468)