SPAC: YASI (14U /11P) - Severe Tropical Cyclone

[CrazyC83]

It's also over desert too so dry air should be penetrating like crazy...this would be like a tropical storm over the US Southwest...

[Rod Hagen]

Yasi seems to have been feeding a huge amount of moisture into the low pressure trough currently crossing south eastern Australia, bringing very heavy rain to many parts of Victoria. We've had 41/2" between 5PM yesterday and 11AM this morning at our place on the fringes of Melbourne (the highest daily figure I've seen here since moving in 20 years ago - the annual average here is only 26") , and other places are reporting more. Flash flooding all over the place. Half a dozen houses flooded at the end of our own road this morning. More expected later in the day, too.

http://www.abc.net.au/news/stories/2011 ... 130698.htm provides some more info.

Yasi, the cyclone that just keeps on giving! Looks like it wants to provide something to the entire continent!

[Tom8]

Yasi, 01/02/11 22:55 UTC
EUMETSAT
http://www.eumetsat.int/groups/ops/docu ... i2_lrg.jpg




http://cimss.ssec.wisc.edu/tropic2/real ... mjava.html


_______________________
Jet stream over the Atlantic
http://www.eumetsat.int/idcplg?IdcService=GET_FILE&dDocName=mpg_atlantic_jet_stream&RevisionSelectionMethod=LatestReleased

[HURAKAN]

Yasi didn't read the part where it said that tropical cyclones dissipate over land!! lol

[Macrocane]

I have always wondered why tropical cyclones last longer over Australia than over other parts of the world, I know it's pretty flat in some parts but US has pretty flat parts too and they dissipate quicker.

[Rod Hagen]

I have always wondered why tropical cyclones last longer over Australia than over other parts of the world,

We are a hot wet continent at present, Macrocane. Less reason for Yasi to chill out than most northern hemisphere countries I fear.

[Chacor]

Brisbane has issued its final severe weather warning on ex-Yasi. Darwin continues to warn on it while Adelaide is issuing flood watches.

IDD20040
Australian Government Bureau of Meteorology
Northern Territory

WARNING

SEVERE WEATHER WARNING
for Flash flooding
for people in the Alice Springs District.
Issued at 5:00 pm CST Saturday 5 February 2011

Synoptic Situation: At 3.30 pm CST, Ex-Tropical Cyclone Yasi 995 hPa was located
near latitude 24.8S, longitude 135.0E, about 160 kilometres southeast of Alice
Springs. It is expected to move slowly towards the west across the southern
Alice Springs District tonight and tomorrow.

Heavy rain conducive to flash flooding is possible over the Alice Springs
District tonight and on Sunday.

The Northern Territory Emergency Service advises that people should secure loose
outside objects and seek shelter when the conditions deteriorate. Driving
conditions may be hazardous - avoid flooded roads and watercourses.

The next warning is due to be issued by 11:00 pm Saturday.

---

IDS20368
AUSTRALIAN GOVERNMENT - BUREAU OF METEOROLOGY
SOUTH AUSTRALIA REGIONAL OFFICE

FLOOD WATCH
For the Northwest Pastoral, Northeast Pastoral and Flinders districts.
Issued at 4:50 pm on Saturday, 5 February 2011

Note: This Flood Watch is a "heads up" for possible future flooding and is NOT a
Flood Warning.

Synoptic Situation:
A deep tropical low pressure system associated with the remnants of Tropical
Cyclone Yasi is located north of Oodnadatta near the South Australia/Northern
Territory border and is expected to move slowly west over the next 24-48 hours.
High levels of moisture associated with this system will result in heavy rain
and isolated thunderstorms over northern parts of South Australia on the
weekend.

Rainfall:
Forecast:
Local falls of 50-100 mm, reaching 100-200 over the Pastoral districts north of
Coober Pedy.

Flood Risk:
This Flood Watch will be updated by 12:00 pm Sunday.
People living or working close to rivers or creeks should monitor the latest
weather forecasts and warnings and be ready to move to a safe location should
flooding develop.

[Rod Hagen]

Looks like Yasi still has a bit of spin, even as it enters SA!

http://www.bom.gov.au/products/IDE00902.loop.shtml

[Rod Hagen]

[Local falls of 50-100 mm, reaching 100-200 over the Pastoral districts north of
Coober Pedy. ]

Not bad, considering that Coober Pedi's average rainfall is just 71mm per YEAR!

[WeatherGuesser]

Still identifiable.

Sort of.

[Rod Hagen]

Yasi really does seem to be growing old and losing its influence now. The rain that was previously being fed into the trough over SE Australia is drying up faster than expected. (Dang it!~ I knew I was wasting my time digging stormwater drains this morning! )

[AussieMark]

well after Yasi destroyed most of our Banana crop I have seen they are up to $6 a kilo already up from $2 or so pre-Yasi

[Chacor]

Looks like it's finally losing its remnant tropicality and turning XT.

[Chacor]

IDD20040
Australian Government Bureau of Meteorology
Northern Territory

WARNING

SEVERE WEATHER WARNING
for Flash flooding
for people in the Alice Springs District.
Issued at 11:00 pm CST Saturday 5 February 2011

Synoptic Situation: At 9.30 pm CST, Ex-Tropical Cyclone Yasi 995 hPa was located
near latitude 24.7S, longitude 134.7E, about 145 kilometres southeast of Alice
Springs. It is expected to move slowly towards the west across the southern
Alice Springs District tonight and on Sunday.

Heavy rain conducive to flash flooding is possible over the Alice Springs
District tonight and on Sunday.

The Northern Territory Emergency Service advises that people should secure loose
outside objects and seek shelter when the conditions deteriorate. Driving
conditions may be hazardous - avoid flooded roads and watercourses.

The next warning is due to be issued by 5:00 am Sunday.

---

IDS20368
AUSTRALIAN GOVERNMENT - BUREAU OF METEOROLOGY
SOUTH AUSTRALIA REGIONAL OFFICE

FLOOD WATCH
For the Northwest Pastoral, Northeast Pastoral and Flinders districts north of
Port Augusta.
Issued at 11:10 pm on Saturday, 5 February 2011

Note: This Flood Watch is a "heads up" for possible future flooding and is NOT a
Flood Warning.

Synoptic Situation:
A deep tropical low pressure system associated with the remnants of Tropical
Cyclone Yasi is located north of Oodnadatta near the South Australia/Northern
Territory border and is expected to move slowly west over the next 24-48 hours.
High levels of moisture associated with this system will result in heavy rain
and isolated thunderstorms over northern parts of South Australia on the
weekend.

Rainfall:
Forecast:
Local falls of 50-100 mm north of Port Augusta, reaching 100-200 mm north of
Roxby Downs.

Flood Risk:
This Flood Watch will be updated by 12:00 pm Sunday.
People living or working close to rivers or creeks should monitor the latest
weather forecasts and warnings and be ready to move to a safe location should
flooding develop.

[CrazyC83]

Finally looks to be extratropical.

[Chacor]

IDD20040
Australian Government Bureau of Meteorology
Northern Territory

WARNING

SEVERE WEATHER WARNING
for Flash flooding
for people in the Alice Springs District.
Issued at 10:46 am CST Sunday 6 February 2011

Synoptic Situation: At 9.30 am CST, Ex-Tropical Cyclone Yasi 999 hPa was located
near latitude 24.8S, longitude 133.0E, about 145 kilometres southwest of Alice
Springs. It is expected to continue moving slowly towards the west across the
southern Alice Springs District during the rest of today and tonight.

Heavy rain conducive to flash flooding is possible over the Alice Springs
District this afternoon and tonight.

The Northern Territory Emergency Service advises that people should secure loose
outside objects and seek shelter when the conditions deteriorate. Driving
conditions may be hazardous - avoid flooded roads and watercourses.

The next warning is due to be issued by 5:00 pm today.

[Chacor]

Convection still persisting around the centre...

[Chacor]

IDS65503
Australian Government Bureau of Meteorology
South Australia Regional Office
TOP PRIORITY FOR IMMEDIATE BROADCAST

SEVERE WEATHER WARNING
for FLASH FLOODING and DAMAGING WINDS

For people in parts of the
Northwest Pastoral district.

Issued at 7:11 pm Sunday, 6 February 2011.

Ex-Tropical Cyclone Yasi is moving westwards, north of the South Australian border and is producing areas of heavy rain with possible flash flooding and isolated thunderstorms in the warning area. Wind gusts in excess of 90 km/h are possible.

Locations which may be affected include Marla, Coober Pedy, Ernabella, Amata, the area around Emu Junction and parts of the Great Victoria Desert.

Since 9 am Saturday, 131 mm has fallen at Todmorden, 103 mm at Arkaroola, 102 mm at Mt Dare, 92 mm at Marree, 86 mm at Yunta and 84 mm at Oodnadatta. Ernabella has recieved 65 mm since 9 am this morning, Coober Pedy has received 23 mm.

The State Emergency Service advises that people should:
* Move vehicles under cover or away from trees;
* Secure or put away loose items around your property.
* Don't drive, ride or walk through flood water;
* Keep clear of creeks and storm drains;
* Stay indoors, away from windows, while conditions are severe.

The next warning is due to be issued by 10:10 pm.

[Chacor]

Looks tropical as ever and no longer has that elongation to it

[Chacor]

Filled to 1002 hPa from 12z Darwin warning. Expected to weaken further and cross into Western Australia tonight. Yasi will have affected four different Australian states/territories directly from its rainfall/winds: QLD, NT, SA and WA.