Interesting weather formation
  • Register
  • Help
Results 1 to 14 of 14
  1. #1
    Local Tyrant gibgib's Avatar
    Join Date
    Mar 2000
    Location
    Sunshine Coast, Queensland
    Posts
    3,515

    Interesting weather formation

    We took these images this afternoon on the Bruce Highway near the Caloundra entry heading south.
    We passed right under that twirly thing & you couldn't see 10 metres in front due to the pissing action brought on by, "Mr Twirly".

    <img src="http://www.aussiefrogs.com/Jpegs/storm1.jpg" alt=" - " />

    <img src="http://www.aussiefrogs.com/Jpegs/storm2.jpg" alt=" - " />

    Advertisement

  2. #2
    Moderator Alan S's Avatar
    Join Date
    Mar 2001
    Location
    Queensland, Australia
    Posts
    8,923
    That is the start of a "water spout" which usually starts to form once the twirly bit gets over the water. If you think that's scarey, you ought to be about 10 miles offshore when one pops up between the boat you're in & the bar you have to cross.
    That's the stuff nightmares are made of eek! eek! eek!

    Alan S
    If it ain't broke, use a 12" shifter.....that usually does the trick!!

  3. #3
    Local Tyrant gibgib's Avatar
    Join Date
    Mar 2000
    Location
    Sunshine Coast, Queensland
    Posts
    3,515
    Yeah but where's the water?
    This was probably 10 - 15k inland about 50 metres to the west of the Bruce Hwy.
    I have some more photos as we passed under as well.

  4. #4
    Administrator GreenBlood's Avatar
    Join Date
    Mar 2001
    Location
    Brisbane
    Posts
    8,131
    gibgib:
    Yeah but where's the water?
    This was probably 10 - 15k inland about 50 metres to the west of the Bruce Hwy.
    I have some more photos as we passed under as well.
    Gibgib I'd say most of it was dumped on Bris at about 5:30 this afternoon eek! fairly brief but torrential downpour.

    Cheers
    Chris
    74 D(very Special) >>Rejuvenation Thread<<
    08 C5 X7 HDi very Noir



    "Déesse" Roland Barthes, 'Mythologies', 1957

    The Déesse has all the characteristics of one of those objects fallen from another universe that fed the mania for novelty in the eighteenth century and a similar mania expressed by modern science fiction: the Déesse is first and foremost the new Nautilus.

    (Umberto Eco [Ed], The History of Beauty, Rizzoli, NY, 2004)

  5. #5
    Moderator Alan S's Avatar
    Join Date
    Mar 2001
    Location
    Queensland, Australia
    Posts
    8,923
    gibgib:
    Yeah but where's the water?
    This was probably 10 - 15k inland about 50 metres to the west of the Bruce Hwy.
    I have some more photos as we passed under as well.
    As I said, "when it gets over the water" is when it all starts to happen.
    The clouds swirl downwards & the water in some kind of venturi action starts to spiral up to meet it; it's a real phenomena that used to be fairly common a few years ago when we had normal weather patterns. Tailor fishermen on the beaches of northern NSW saw them often & a mate of mine, fishing on a "bombie" off the Tweed actually took a tomahawk to his anchor rope to miss one monster that blew water straight up off "Fido" he claimed as nearly 50 feet about 2 minutes after he hightailed it.
    I was fishing on the gravel patch off Palm Beach many years ago when a storm came in & one stood up just outside the Currumbin bar as we approached it. That was a thrill. eek! dance :p

    Alan S cheers!
    If it ain't broke, use a 12" shifter.....that usually does the trick!!

  6. #6
    Fellow Frogger! sfrawley's Avatar
    Join Date
    Feb 2001
    Location
    Goolwa SA
    Posts
    328
    It looks like the first stages of a tornado that presumably didn't eventuate. The Severe Weather section of the Bureau of Meteorology in Brisbane might be interested in your pix - they investigate that type of thing.
    Stephen
    '03 P406 HDI
    '16 Renault Master

  7. #7
    Member
    Join Date
    Jun 2002
    Location
    Adelaide
    Posts
    75
    Hey GibGib
    I would say you would have to be one of the lucky few Australians who have actually seen a tornado in this country (and got a shot of it).

    I used to be a meteorlogical observer with the Bureau of Met. a few years back and if I had seen something like this I would most definitely have been reporting a tornado sighting.

    Tornados are produced by very specific circumstances of air temp, humidity, windspeed and wind shear. They are not well understood but are known to be produced from large active storm cells (cumulonimbus) that contain severe wind shear within the storm cell.

    Tornados are more common in Australia than most people realise. They generally occur in remote and unpopulated tropical/sub tropical areas and is the reason that there are not that many sightings and property damage is usually quite low.

    The vortex of a tornado is actually invisible until it sucks in water or debris. The tornado in the picture could have actually been on the ground but had no debris visible within the vortex. Windspeeds in these things have been know to suck chunks of bitumen from the road, 300mph+.
    The fastest windspeeds ever recorded on the planet have come from tornados in the USA.

    Waterspouts and tornados are the same beast except one occurs over the water, the other over land.

    Nice one

    head_ban

    citroen_ AXGT
    citroen_ Xsara 1.8 16v

  8. #8
    Member
    Join Date
    Jun 2002
    Location
    Adelaide
    Posts
    75
    Oh yeah
    Send your shots in to the Bureau.
    Ya never know, they might just put them in their annual weather calender.
    cheers

  9. #9
    Local Tyrant gibgib's Avatar
    Join Date
    Mar 2000
    Location
    Sunshine Coast, Queensland
    Posts
    3,515
    Interesting.

    The Bureau of Met now have these images but I haven't got a response as of yet.
    I don't think there was any wind with this (not at ground level anyway) but it was hard to tell as the rain REALLY pelted down as we past through it.

    I have high res pictures if anyone wants.

  10. #10
    Member
    Join Date
    Jun 2002
    Location
    Adelaide
    Posts
    75
    I would really *love* those hi-res images.
    You can send them to [email protected]

    Thanks heaps
    cheers! cheers!

  11. #11
    Local Tyrant gibgib's Avatar
    Join Date
    Mar 2000
    Location
    Sunshine Coast, Queensland
    Posts
    3,515
    You have email....

  12. #12
    Local Tyrant gibgib's Avatar
    Join Date
    Mar 2000
    Location
    Sunshine Coast, Queensland
    Posts
    3,515
    The official word for those interested.
    Severe Weather Section, Queensland Regional Office
    Bureau of Meteorology

    -------------------------------------------
    My account:

    Thanks for the reply.
    I visit "bom" at least twice a day. I look at the Radar for Brisbane &
    Gladstone & look at the satellite image if a TC is hovering about somewhere
    around Aust. Climate info is invaluable. Great service.

    The first photo was taken at 5:28PM - DSC01809 (they are in numerical
    order).
    The lower darker part seemed to fall & form over a 5 - 10 minute period.
    When it took some shape we grabbed the digital camera out.

    The shots were taken near the Caloundra entry ramp looking/ heading south on
    the Bruce Hwy, Queensland. We had heard of a storm that passed through
    Brisbane on 4BC news with torrental rain & figured this front was the same
    storm heading northwards.

    There was no wind to speak of, no hail, no lightning or damage to trees. As
    we were heading into the storm at 110km's we couldn't have heard thunder if
    it were associated. The motion in the cloud formation was very slow & hardly
    noticable
    .
    We would have passed just to the left of the epi-centre. There was a
    definite division between raining & not raining looking ahead. Fine drizzle
    leading up to it.

    It felt like we impacted with the rain when our car met with the heavy
    stuff..
    The rain pelted down & all cars in front & behind had slowed down to 30k's
    (110k zone).
    The heavy rain only lasted about 500 metres or so then pretty much stopped.

    The last photo - DSC01816 shows a view out the back window just before we
    went through it.
    DCS01815 is the last photo we took of the formation before the rain.

    On our way up to the sunshine coast earlier that Saturday I noted a lot of
    water laying around by the side of the highway from recent rain. Perhaps the
    twister was meeting this water???

    I have put the files on a server as they range between 700 - 800 K each.
    Let me know when you have them so as I can free up the space.

    ---------------------------------------
    The response

    Thanks very much for giving me access to the remainder of your photographs
    taken on March 1st. I found the photographs and your account of what was
    observed very interesting.

    The horizontal base of dark cloud on the right half of eg. DSC01810.JPG is
    known as a "gust front" and marks the boundary between warm, rain free air
    flowing into the thunderstorm and cool, rain filled air flowing out of the
    storm. This boundary can often be very abrupt - from virtually nothing to
    torrential rain, as you encountered on this occasion!

    The rounded lowering which was the subject of your photographs is probably
    evidence of rotation in the air currents flowing into the storm. In some
    storms this rotation is confined to the gust front itself. In other types
    of storms this rotation can extend throughout a considerable depth of the
    storm and can on occasion give rise to a funnel cloud or tornado. Such
    formations are known as "wall clouds" or "mesocyclones".

    Thanks again for the photographs, which are some of the more spectacular
    examples of the phenomena I have seen. We always appreciate reports such as
    this. I have now downloaded and saved the photographs, so you may remove
    them at your leisure.

    -------------------------------------
    Here are the Hi Res images if you want them:

    <a href="http://63.251.216.52/download/DSC01809.JPG" target="_blank">http://63.251.216.52/download/DSC01809.JPG</a>
    <a href="http://63.251.216.52/download/DSC01810.JPG" target="_blank">http://63.251.216.52/download/DSC01810.JPG</a>
    <a href="http://63.251.216.52/download/DSC01811.JPG" target="_blank">http://63.251.216.52/download/DSC01811.JPG</a>
    <a href="http://63.251.216.52/download/DSC01812.JPG" target="_blank">http://63.251.216.52/download/DSC01812.JPG</a>
    <a href="http://63.251.216.52/download/DSC01813.JPG" target="_blank">http://63.251.216.52/download/DSC01813.JPG</a>
    <a href="http://63.251.216.52/download/DSC01814.JPG" target="_blank">http://63.251.216.52/download/DSC01814.JPG</a>
    <a href="http://63.251.216.52/download/DSC01815.JPG" target="_blank">http://63.251.216.52/download/DSC01815.JPG</a>
    <a href="http://63.251.216.52/download/DSC01816.JPG" target="_blank">http://63.251.216.52/download/DSC01816.JPG</a>

  13. #13
    Fellow Frogger! MY 4's Avatar
    Join Date
    Jan 2003
    Location
    Sydney
    Posts
    481
    Hey - Gibgib, the links to those images you have provided do not work...?

    Are they the right ones? I am very keen to have a looksy!

    ta'!
    ~Dave Power` [MY 4] :

    "#PW33RR" --- > "PW33RR" 2009 Mazda6 MXR-CD, 2.2L Turbo Diesel - More torque than the last! Geesssuz[/COLOR] HOT
    "#ZEG01F" --- > 2006 VW Golf 2.0L TDI - The torque machine SOLD
    "MY 4" --------------- > 2002 Monaco Blue RenaultSport Clio MkII SOLD
    "XES11V" ---------- > 1999 Mitsubishi Mirage STOLEN

  14. #14
    Local Tyrant gibgib's Avatar
    Join Date
    Mar 2000
    Location
    Sunshine Coast, Queensland
    Posts
    3,515
    D'oh!

    I wonder why that is

    I've put them here as well:

    <a href="http://64.33.26.244/download/DSC01809.JPG" target="_blank">http://64.33.26.244/download/DSC01809.JPG</a>
    <a href="http://64.33.26.244/download/DSC01810.JPG" target="_blank">http://64.33.26.244/download/DSC01810.JPG</a>
    <a href="http://64.33.26.244/download/DSC01811.JPG" target="_blank">http://64.33.26.244/download/DSC01811.JPG</a>
    <a href="http://64.33.26.244/download/DSC01812.JPG" target="_blank">http://64.33.26.244/download/DSC01812.JPG</a>
    <a href="http://64.33.26.244/download/DSC01813.JPG" target="_blank">http://64.33.26.244/download/DSC01813.JPG</a>
    <a href="http://64.33.26.244/download/DSC01814.JPG" target="_blank">http://64.33.26.244/download/DSC01814.JPG</a>
    <a href="http://64.33.26.244/download/DSC01815.JPG" target="_blank">http://64.33.26.244/download/DSC01815.JPG</a>
    <a href="http://64.33.26.244/download/DSC01816.JPG" target="_blank">http://64.33.26.244/download/DSC01816.JPG</a>

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •