
Details and video here.
Hail that covered the ground like snow along the Gold Coast, photo below:
Photo: Isabelle Vallin-Thorpe who writes – Photos taken tonight from where we live, Gold Coast hinterland. I nearly slid off the road, brakes got jammed, too much hail and snow… which is holding in some areas.
h/t to reader Ray
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Captured formation of *two* waterspouts simultaneously while recording – kinda confirming Dr. Joseph Golden five stages of waterspout formation:
1. Dark spot. A prominent circular, light-colored disk appears on the surface of the water, surrounded by a larger dark area of indeterminate shape and with diffused edges.
2. Spiral pattern. A pattern of light and dark-colored surface bands spiraling out from the dark spot which develops on the water surface.
3. Spray ring. A dense swirling annulus (ring) of sea spray, called a cascade, appears around the dark spot with what appears to be an eye similar to that seen in hurricanes.
4. Mature vortex. The waterspout, now visible from water surface to the overhead cloud mass, achieves maximum organization and intensity. Its funnel often appears hollow, with a surrounding shell of turbulent condensate. The spray vortex can rise to a height of several hundred feet or more and often creates a visible wake and an associated wave train as it moves.
5. Decay. The funnel and spray vortex begin to dissipate as the inflow of warm air into the vortex weakens.
Related – the dust devil:
Dust Devil at a soccer game (dramatic footage):
On a drive out west (Nevada) yrs ago during June or July, witnessed many a DD out away from the highway .. pretty awesome sights, really.
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BOM has a brief description of waterspouts…..
They move clockwise as intense low pressure systems do in the SH. I was on the edge of this system but it looked very impressive as it moved North East, we had some hail but nothing like the Gold Coast. On June 3 , last year a waterspout moved over land at Lennox Head NSW, causing localised damage. As I type this, there is thunderstorm activity outside. Better go.
Coldest May on record for Darwin.
http://www.smh.com.au/national/coldest-may-on-record-for-darwin-20110531-1fe1x.html
Chris,
It has been discussed at WUWT before, but Willy-Willy’s in Australia are not tornadoes or tropical cyclones, they are dust devils. There has been some conjecture that the term Willy-willy was derived from a aboriginal name which described a tropical cyclone, but these days a willy-willy is a term for the not infrequent dust devil.
A tornado can rotate either clockwise or anticlockwise in the NH or SH depending on the vertical wind shear at the time of formation. Indeed most tornadoes in the SH do rotate clockwise and in the NH anticlockwise but exceptions do occur.
Intense rain thunder and marble sized hail (I sectioned two but there was no discernible nucleus), it cleared, I fed the horse, and to the east was a patch of Mammatus clouds of which this is an example.
_Jim, neat info in those 5 points on formation. You know, that’s the same way dust devils seem to form, bottom up in contrast to real tornadoes always top down. Seeing that water spout made me want to go play in it! I’ve done that in a dust devil, but the dust in your eyes!
You might find this interesting on how waterspouts and dust devils may form from the same effect (maybe not):
http://europa.agu.org/?view=article&uri=/journals/jc/JC075i003p00531.xml
I never knew that. That seems to be the reason they form bottom up and are so relative weak compared to actual tornadoes, being only dependant on the lower meter or so.
Len van Burgel says:
May 30, 2011 at 10:49 pm
Chris,
It has been discussed at WUWT before, but Willy-Willy’s in Australia are not tornadoes or tropical cyclones, they are dust devils. There has been some conjecture that the term Willy-willy was derived from a aboriginal name which described a tropical cyclone, but these days a willy-willy is a term for the not infrequent dust devil.
==================
Since I am apparently the only “Chris” within earshot of this post….please cite for me where I said “willy-willys” were tropical cyclones, dust devils, tornadoes, whirlpools, eddies, vortices, zephyrs….or anything of the like???
I was talking about the waterspouts on the dramatic footage shown.
Last time I checked (at least in the US) they are called waterspouts.
Now you guys might want to call them waterdevils….and that is fine.
Speaking of devils…..check out the whirling dervish dance of violent vortices before they suddenly combine and WHAM.
The most deadly tornado to hit the USA in half a century…is about to be born.
If there ever was a textbook description in video, of the term CYCLOGENESIS, it is this one:
Chris
Norfolk, VA, USA
I don’t have any links but the weather forecast on channel 7 news tonight mentioned that Darwin had it’s coldest QUARTER in decades, Sydney had it’s codest May night, and sure it was alright, since 1970. Added to this Canberra had it’s coldest May night in 74 years recently, and we still have winter to go.
Are the alarmists still convinced CO2 causes global warming, y’know before it became climate change?
We get those things here in Zimbabwe too. They occur from early July and run through till the rains start in early November.
We call them “dust devils” because they occur mainly over the dry, dusty land but I have seen several on lake Kariba over the years.
Andy G55 says:
May 30, 2011 at 6:48 pm
To say that hail storms on the east coast of Australia, and waterspouts are something that is different and unusual, obviously has never lived on the east coast of Australia for any length of time.
————————————————————————–
Indeed. I remember well the wet period in the 50’s with water spouts quite common.
Another myth “bites the dust”.
In Australia waterspouts are just a thing of the past.
[Apologies for any typing copy errors]
Savethesharks, look three messages down from yours to the Chris I am referring to (May 30, 7.52pm).
I have no argument with you.
A dust devil over water is a waterspout. As is a tornado over water. As has been described above they form from different mechanisms. My comment to Chris was something else.
In Australia and NZ hailstones are a sign that the weather is getting weirder.
[Apologies for any typing copy errors]
How about a Snownado from Canada.
Go Canucks go!
The Globe is warming so fast it’s causing tornadoes (or is that tornados) everywhere. It’s worse than we thought!
Al Gore says that if we scrape the surface of the earth this is what we’ll from those millions of degrees.
http://www.youtube.com/watch?v=5Fw1qiAld2U&feature=related
If only he had one degree…..in Science.
And now Ice circles are cropping up wherever there’s Global Warming……….and a video camera.
Oh, the humanity!
@chris B. That’s what I calls a waterwheel!
I’m the Chris that was talking about the Willy-willy. I understand the difference between tornado and dust-devil etc.. What I was referring to is the way the media, here in Australia, has started using the term mini-tornado to refer to what are actually only large dust devils (willy-willy). I suspect it’s classic stuff along the lines of mini-tornado (is there any such thing?) sounding so much more dramatic than ‘large willy-willy’ does. The media love the dramatic.
Chris in Adelaide:
I get the impression that the media are using the term mini-tornado for severe thunderstorm downbursts. That is because meteorologists are reluctant to attribute damage confined to a narrow swath as being caused by a tornado without a site inspection first being made. This is especially so for winter tornadoes where a clear funnel is not always observed. Severe thunderstorm downburst damage is similar to tornado damage and often only after on the site inspection to determine if there is rotation evident in the damage path, can it be said with certainty a tornado occurred. Unless of course eyewitness accounts or the severity of the damage make it obvious. In the meantime a mini-tornado or a tornadic squall is a reasonable compromise as a description.