Southern Ocean Freak!!!!
Posted: Wed Mar 28, 2007 12:09 pm
I think there might be some swell on it's way to SA and Vicco ![Shocked :shock:](./images/smilies/icon_eek.gif)
![Shocked :shock:](./images/smilies/icon_eek.gif)
haha wat were u eatin for dindins?it must have been really huge to be that tight and make you choke.Nick-W wrote:Saw it on the news, just about choked over dinner... its so tight and huge!
SSR come around for dinner? :?Nick-W wrote:It was just sausages...
Too true SAsurfa, but low pressure systems in the great australian bight getting way below 1000 hpa are pretty common. I'm not so sure this is a freak event at all, other than that it is pointing rather nicely up towards the South Oz coast.SAsurfa wrote:Looks very interesting and I love checking the weather charts and seeing how close the isobars are being squezzed![]()
I bet you east coast guys wish you had a cyclone like this sitting off your coast, its crazy how you can see the centre of the low is at 969hPa and the 2 tropical cyclones on the east and west coasts only have centre pressures of 980hPa and 984hPa respectively
It is pretty rare mainly due to the high core winds at such a southern lattitudeoldman wrote:Too true SAsurfa, but low pressure systems in the great australian bight getting way below 1000 hpa are pretty common. I'm not so sure this is a freak event at all, other than that it is pointing rather nicely up towards the South Oz coast.SAsurfa wrote:Looks very interesting and I love checking the weather charts and seeing how close the isobars are being squezzed![]()
I bet you east coast guys wish you had a cyclone like this sitting off your coast, its crazy how you can see the centre of the low is at 969hPa and the 2 tropical cyclones on the east and west coasts only have centre pressures of 980hPa and 984hPa respectively
969 is pretty low though, but in general the low pressure systems that pass underneath Australia can make the average cyclone look like a pretty tame event. I think the difference is that the cyclones are much more focussed and only cover a small area, possibly with higher wind speeds, but only near the very centre of the storm.
But the southern ocean lows can be as big as the continent. Tap into that power and we never need to burn any coal again.
Checkout this 30 image sat close up, just look at that baby formswellnet wrote: While a bombing low is defined as a drop in central pressure of 24hPa over 24 hours, a 'superbomb' or 'ultrabomb' takes into account the strength of the winds based on latitude, which is expressed in 'bergerons'. In order to upgrade the classification of a bombing low to a superbomb or ultrabomb, the intensification rate must be greater than 2 bergerons. "According to the official charts, this system comes in at 2.07 bergerons at 40 degrees south in the 24 hours ending 12UTC yesterday" said Stuart. There's a marked difference between bombing lows in the polar regions compared to the mid latitudes, with wind strengths in the polar regions usually exhibiting less strength (from a comparable pressure drop) due to the effects of latitude.
Currently 6-12 metres @ 10-16 seconds and still risingSAsurfa wrote:Its starting to hit now looking at the Cape Du Couedic wave buoy http://www.bom.gov.au/products/IDS65030.shtmlWill peak into tomorrow lunchtime/arvo I reckon.
It's the speed at which the low 'bombed', which makes it a freak event (see the article for more info on this). This is also what caused the extremely high wind speeds.oldman wrote:I'm not so sure this is a freak event at all, other than that it is pointing rather nicely up towards the South Oz coast.
Thanks Ben. I was hoping you might pick up on that comment and enlighten me.thermalben wrote:It's the speed at which the low 'bombed', which makes it a freak event (see the article for more info on this). This is also what caused the extremely high wind speeds.