Eastern Australian Weather

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Eastern Australian Weather

Postby StormchaserMatt » Fri Feb 13, 2009 10:53 am

Top Priority for Immediate Broadcast
Flash Flooding
For people in
Upper Western, North West Slopes and Plains, Far North Coast, Midnorth Coast and Hunter.

Issued at 1:50 pm on Friday 13 February 2009

Synoptic Situation: 12:00 noon EDT Friday
A low pressure trough lies over the northern NSW inland, extending from a low over southwest Queensland. This inland low is expected to weaken during Saturday as an East Coast Low forms off the southern Queensland/northern NSW coast. The East Coast Low is forecast to move southwards adjacent to the coast later on the weekend. Moist easterly winds feeding into these systems is likely to generate widespread rainfall over the next few days.

Thunderstorms and areas of heavy rain are expected to cause flash flooding in eastern parts of the Upper Western and the North West Plains tonight.

On Saturday the focus of rain will shift to the North West Slopes and Plains as well as coastal districts north from the Hunter. The heavy showers and rain are expected to cause Flash Flooding in these areas.

Flood Watch for western flowing rivers from the Macintyre to Bogan Valleys and for coastal valleys from the Queensland Border to the Hunter
Issued at 1:35 PM on Friday the 13th of February 2009

Moderate to heavy rain is expected over the northern NSW inland later today
(Friday) which has the potential to cause local and main river flooding in the
following areas overnight and Saturday:

1. Macintyre Valley
2. Lower Gwydir Valley
3. Lower Namoi Valley
4. Lower Castlereagh Valley
5. Lower Macquarie and Bogan Valleys
6. Local flooding is also possible in the general Bourke, Brewarrina, Walgett,
Lightning Ridge and Collarenebri area

During Saturday, heavy rain is expected to develop over northeast NSW continuing
into Sunday. These falls are likely to cause local and main river flooding in
several coastal valleys from the Queensland border to the Hunter. The following
catchments are likely to experience local and main river flooding over the

1. Tweed Valley
2. Brunswick Valley
3. Richmond Wilsons Valley
4. Orara River
5. Coffs Harbour
6. Bellingen, Kalang and Nambucca River Valleys
7. Hastings River Valley
8. Macleay Valley
9. Manning Valley
10.Karuah Valley
11.Hunter Valley

A Severe Weather Warning is also current for the area.

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Re: Eastern Australian Weather

Postby StormchaserMatt » Fri Feb 13, 2009 1:42 pm

Gale warning north of Port Macquarie. Strong Wind Warning Port Macquarie to Broken Bay.

Synoptic Situation
A strong high near Tasmania extends a ridge along the NSW coast. The high is expected to move slowly to the southern Tasman Sea on Saturday, while a low develops just off the southern Queensland coast. The low will move south along the NSW coast over the following few days, accompanied by strong to gale force winds.

Far North Coastal Waters, Point Danger to Wooli and 60nm seawards:
Gale Wind Warning
Friday until midnight: Wind: E/SE 20/30 knots, reaching 25/33 knots at times. Sea: 2 to 3 metres, Swell: SE 2 to 2.5 metres.
Saturday: Wind: E/SE 25/33 knots increasing early to 30/40 knots. Sea: rising to 3 to 4 metres. Swell: E/NE 2 to 3 metres increasing to 3 to 4 metres, breaking dangerously close inshore.
Sunday: Wind: E/NE 25/33 knots, decreasing to N/NW 15/25 knots.
Monday: Wind: NW/NE 15/25 knots.

Forecast for Friday evening
Rain areas. Local moderate to heavy falls. Moderate to fresh east to southeast winds.

Forecast for Saturday
Dangerous surf conditions. Rain, locally heavy falls. Fresh to strong east to southeast winds, gusty near the coast.

Lismore: Rain periods. Min: 19 Max: 23
Cape Byron: Rain periods. Min: 21 Max: 23
Grafton: Rain periods. Min: 20 Max: 23

Forecast for Sunday
Rain, locally moderate to heavy falls. Isolated thunderstorms. Moderate to fresh east to southeast winds.

Lismore: Rain periods. Min: 18 Max: 25

Forecast for Monday
Isolated showers and thunderstorms. Northwest to northeast winds.

Lismore: Shower or two. Min: 18 Max: 26

Forecast for Tuesday
Scattered showers. Isolated thunderstorms. North to northeast winds.

Lismore: Few showers. Min: 19 Max: 28

From heat wave to floods

In contrast to the heat wave conditions experienced last weekend the Bureau of Meteorology is alerting the public to a developing weather system that will bring flooding to parts of northern New South Wales this weekend.

Moderate to heavy rainfall is expected over northern NSW today. During the weekend an east coast low is expected to develop with the potential to bring heavy rainfall and gale-force winds to parts of the North Coast, Mid North Coast and Hunter with the heavy rainfall extending inland to the Northwest Slopes and Plains. See Forecast Rainfall Map. Gale force winds and very rough seas are likely to affect the coastal waters.

It is too early at this stage to predict the precise location of the heaviest rainfall and strongest winds, as this will depend on the eventual position and movement of the centre of the low. However people are advised to monitor up-to-date forecasts and warnings for more information as the weather system develops. A Flood Watch and a Severe Weather Warning have been issued.

The NSW State Emergency Service [SES] advises people: Never drive, ride or walk through floodwater, stay well clear of creeks, storm drains and causeways and keep listening to your local radio station for information, updates and advice.

Not good for my uni trip travel to Armidale on Sunday!

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Re: Eastern Australian Weather

Postby Vinny » Sun Feb 15, 2009 9:36 am

I wish we over in the west could get just 10mm :( no rain here since November :cry:
Yeppoon Annual Average Rainfall is (BOM) = 982.5mm
2012 Yeppoon 976.8mm

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Re: Eastern Australian Weather

Postby @weather_wa » Fri Feb 04, 2011 5:51 pm

Take a look at the radar over South Eastern South Australia:


http://www.weatherzone.com.au/radar.jsp ... tate&lc=sa

And Victoria is getting allot of rain and storms:

http://www.weatherzone.com.au/radar.jsp ... ate&lc=vic

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Re: Eastern Australian Weather

Postby Tasman » Fri Feb 04, 2011 9:58 pm

...continues to be an interesting and pesty system...

Severe storms, flash floods hit Melbourne and parts of Victoria
By staff writers
From: Herald Sun
February 04, 2011 10:44PM

MONSOON rains have lashed Melbourne and parts of Victoria, bringing flash flooding and the threat of worse to come tomorrow.

The deluge comes in the wake of Cyclones Yasi and Anthony.

Weather bureau forecaster Terry Ryan said the widespread impact of Cyclone Yasi had been "unprecedented''.

"Yasi has gone inland, and all the moisture is spreading southwards,'' he said.

"For a (cyclone) system to be so intense, so far inland, is unprecedented.

"We've never seen anything like it in Australia.''

He said Cyclone Anthony had also contributed.

Melbourne's southeastern suburbs have been hit by severe thunderstorms, with up to 33mm of rain bucketing down in just 15 minutes in some suburbs.

Brighton was the hardest hit, metropolitan fire fighters said, while Mentone was virtually underwater by 7.15pm.

About 100mm of rain drenched Lyndhurst, while Melbourne’s CBD saw 17mm in just 20 minutes.

The Bureau of Meterology reported 89mm fell in Dandenong, Menton received 71mm, and Avalon 34mm.

Winds reaching 130km/h hit Laverton, while St Kilda and Fawkner were whipped with 100km/h winds.

Flash flooding was reported in the Melbourne CBD, Narre Warren, Mentone, Chelsea, Lyndhurst and Werribee.

SES spokesman Lachlan Quick said there had been more than 1200 calls for help across the state by 8pm, with Mildura the worst hit.

He said about a dozen people had been rescued from their cars, including a woman and her two children in Chelsea, in Melbourne’s southwest.

“Their car was actually floating in floodwaters,” he said.

The Nepean Highway near Carlisle Street in East St Kilda was down to two lanes due to flash flooding, with traffic at a virtual standstill. Traffic lights along the highway were flashing yellow, or not working.

Parts of St Kilda Road leading into the CBD were also flooded, with motorists resorting to driving on the tram tracks.

A Metro spokeswoman said most lines were affected by flash flooding.

The Frankston line is suspended; the Sandringham line is suspended from South Yarra to Sandringham; the Belgrave line is suspended between Ferntree Gully and Belgrave, and the Alamein line has been suspended between Camberwell and Alamein.

Buses have been ordered but Metro is advising passengers to defer travel or seek alternative arrangements.

Extremely high rainfall and flash flooding has also been reported in many parts of the state. Mildura in the north of Victoria received 100mm of rain in just two hours.

The deluge broke the daily rainfall record and prompted the most calls for help from the SES.

Halls Gap residents were evacuated to Stawell as a wild storm caused flooding and landslips.

Tianne Millane, 23, at the Mercure Hotel in Mildura said the deluge started at 4pm and was still going.

"There's been people stuck in their cars and I have heard that someone was rescued from their car.''

At 7.21pm, The Bureau of Meteorology issued a severe thunderstorm warning for damaging wind, flash flooding and large hailstones for people in the Central, East Gippsland, Mallee, Northern Country, North Central, North East, West and South Gippsland, Wimmera and parts of the South West .

The wild weather is forecast to last for several hours.

Locations which may be affected include Melbourne, Mildura, Horsham, Ballarat, Bendigo, Shepparton, Seymour, Maryborough, Geelong, Wodonga, Wangaratta, Traralgon and Bairnsdale. Extremely high rainfall/flash flooding has been reported in many parts of the state.

A flood watch is current for the greater Melbourne catchments of Werribee, Maribyrnong, Yarra, Dandenong and Bunyip.

Goulburn Murray Water began releasing water from five reservoirs including Lake Eppalock which is already above 100 per cent in the hope it will prevent a repeat of the flooding along the Campaspe River.

Read more: http://www.news.com.au/national/storm-to-move-south-and-soak-victoria/story-e6frfkvr-1226000442820#ixzz1CzybERpu

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Re: Eastern Australian Weather

Postby Tim S » Sat Feb 05, 2011 1:54 am

Yeah quite a major event in progress for those soggy Vics, was quite a few 100mm+ falls overnight in the SE suburbs of Melbourne overnight. The BoM are also forecasting another 50mm+ for most of Central & Eastern Victoria today.

The bad news is the regions that were in flood only a week or two back look like they are getting flooded again, poor buggers. :(

Looking at the http://www.theaustralianweatherforum.com/forum sounds as Mildura is in flood again, can't find news articles on it but it sounds fairly serious, I am sure we'll hear more about it once it gets light over there.
Youtube vid of the flash flooding they got yesterday arvo: http://www.youtube.com/watch?v=JqSoMPDQ1Do
Kia Kaha, stay strong, live long and above all have fun. :)

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Re: Eastern Australian Weather

Postby Pete » Sat Mar 12, 2011 12:40 pm

From Weatherzone news:

[Rescue crews abused in drenched north Qld
Kerrin Binnie, Friday March 11, 2011 - 19:35 EDT

As flooding continues to hamper cyclone recovery efforts in Queensland's north, State Emergency Service workers are being abused by people they are trying to help.

Authorities say it is only a minority of people but it is causing tension. Some crews have had enough and are refusing to work. Others who were heading to the region are staying at home.

Heavy rain and flooding is adding to north Queensland's misery.

The weather bureau says a low has developed off the coast near Innisfail, south of Cairns.

The town is being pounded by rain, which is extending north from flooded communities like Cardwell and Tully.

Disaster-weary communities on the Cassowary Coast remain cut-off today.

SES and local council crews have been working since cyclone Yasi hit more than five weeks ago. They have been clearing mounds of debris and making temporary repairs to homes.

But Cassowary Coast Mayor Bill Shannon says they are starting to be abused.

"Personal abuse about 'why don't you go and do this? Or where have you been? Or you blokes are hopeless' - all this sort of stuff," he said.

"It's just not on. Not when there's a huge effort going in, it's just very, very disruptive."

He says the criticism is often unfounded.

"Not only are they a minority, they're often misinformed and they're counter productive," he said.

"This criticism, when it's not constructive criticism, is counter-productive to the effort we're all trying to achieve and that's the part that makes me very angry."

As local SES crews become fatigued, they're being replaced with others from outside the region or interstate.

Mr Shannon says he knows of one crew that has heard about the abuse and cancelled their trip.

"These are all volunteers and a group of them don't want to come because they're very upset by a lot of the personal criticism they're getting, they're very upset by some of the reports in the media and the abuse that they're copping," he said.

"Certainly council workers are also copping abuse and the point that I want to make is I fully support SES workers.

"If they're going around and they're getting abused and I know they are, then I wouldn't be coming either."

Mr Shannon says he understands there is frustration in the community but says it is being directed at the wrong people.

"I just say to people who want to make criticisms and they are constructive criticisms, it's is always welcome; ring the mayor, ring the elected councillors," he said.

"But to turn around and abuse SES workers or council workers, personal abuse is just not on."

Flooding is still causing problems across north Queensland. A monsoon trough has dumped heavy rain across the region leaving several towns cut off. Many are running low on essentials.

The Premier has spent Friday afternoon in Cardwell in far north Queensland, where flooding is hampering efforts to rebuild the town after Cyclone Yasi.

Anna Bligh has met residents who have been dealing with the natural disasters.

She says while the flooding has been a setback, she can see the progress in the cyclone recovery effort that has been made since her visit last month.

"I met this afternoon with staff at the recovery centre in Cardwell who tell me that there hasn't been a lot of people through in the last couple of days obviously because of the rain has made it difficult for them to get there," she said.

"But they are there with new teams that have been replaced to meet with people to make sure that they're getting the grants and the assistance that they're eligible for."

Medical supplies have been flown into Halifax near Ingham.

Persistent rain around Ingham today has taken the town's total rainfall since Sunday to around 700 millimetres.

Local Mayor Pino Giandomenico says isolation is becoming a problem.

"The shop has run out of powdered milk and bread-making flour. So they're a couple of issues that we have to address," he said.

Floodwater has dropped in some places, revealing more damage to infrastructure.

"We're just looking at repairing... the roads are falling apart all over the place, so we're just looking at patching the roads up so that people don't do any damage to their vehicles," he said.

Disaster management authorities have carried out helicopter drops of mainly medical supplies in outlying areas including Halifax, Lucinda and Abergowrie.

Ingham will again be cut off on Friday night, with police closing the Bruce Highway after allowing through trucks with food supplies and local high-clearance vehicles.

There has also been moderate falls in Townsville as the rain band moves south.

The weather bureau says it does not expect conditions in Townsville to improve until mid next week. Sara Lando.

Ninety-nine per cent of Queensland is disaster declared after a summer of flooding rain and cyclones.

The Aurukun Shire council on Cape York is the only local government area not eligible for disaster recovery funding.


© ABC 2010

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Re: Eastern Australian Weather

Postby Tasman » Mon May 30, 2011 6:35 pm

Flash flooding around Sydney...

Flash floods cause havoc on Sydney roads, sparking 111 calls for SES assistance
From: AAP May 30, 2011 6:23PM

WET and wild weather has caused chaos across Sydney, with city motorists rescued from flash flooding and a driver killed in a major freeway crash.

"At the present time it is very, very dangerous," said a State Emergency Services (SES) spokesman.

He said five people had to be rescued when they became trapped by localised flash flooding in the metropolitan area, with Sydney's inner-southern suburbs the worst affected.

"There was an immense amount of water fall on that particular area when the severe weather cell went through there," the spokesman told Macquarie Radio.

He warned trapped motorists to remain in their cars because they could be "swept down drains".

Cars were stuck on Botany Road near Bourke Street at Zetland, Elizabeth Street near Joynton Avenue at Zetland, O'Riordon Street at Alexandria and Barker Street at Kingsford.

Drivers are being warned to take extreme care and allow extra time for journeys.

"There have been 111 calls for assistance in the last four hours alone," the SES spokesman said.

"If there is a life-threatening situation where you have come into floodwaters, dial triple-zero."

Torrential rain delayed train and bus services and buses replaced ferries between Parramatta and Rydalmere due to flooding at Parramatta Weir, NSW Transport said.

Following drenching overnight rain, Sydney CBD received about 20mm from 9am, the Bureau of Meteorology said.

It has issued a severe weather warning for flash flooding for the Hunter, Sydney Metropolitan and Illawarra Regions.

"The heavy rain is expected to hang around for the next few days, and it is vital that motorists stick to the road rules and drive to the conditions," Assistant Commissioner John Hartley said.

"Speeding or committing other offences behind the wheel on wet roads could end with you or an innocent road user being seriously injured or killed."

One person has died and two others remain trapped in the wreckage of a four-car pile-up on a freeway north of Sydney.

The northbound vehicles were involved in a collision near the Mooney Mooney Bridge on the F3 about 4.40pm (AEST) today.

Read more: http://www.news.com.au/national/storms- ... z1NpYqksUv

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Re: Eastern Australian Weather

Postby @weather_wa » Wed Jun 15, 2011 1:57 pm

Major flooding on the NSW Mid North Coast:

http://www.weatherzone.com.au/news/majo ... ast-/17693

The last 24 hours has seen the heaviest rain in three years fall over parts of the Mid North Coast.

Carey's Peak picked up the most with a torrential 198mm to 9am, which is the heaviest in at least 2 years. Mt Seaview gained a hefty 175mm and their heaviest rain in 3 years.

This heavy rain has resulted in localised flooding, with major flooding on the Macleay River at Kempsey. Major flooding is also occurring on the Hastings River at Kindee Bridge. This flooding has led to the evacuation of parts of Kempsey and surrounding towns.

The heavy rain is thanks to a low sitting just off the NSW north coast, which is also directing in strong and potentially damaging winds over the coast south of the Northern Rivers, creating dangerous surf conditions.

The Bureau of Meteorology has issued a severe weather warning for the Hunter and Mid North Coast for damaging winds, flash flooding, abnormally high tides, and damaging surf.

The heavy rain is expected to move slowly south today as a low drifts down the coast. The heaviest rain is expected to stay north of Sydney.

Strong winds and heavy rain should ease on Thursday as the low heads east across the Tasman Sea.

- Weatherzone

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Re: Eastern Australian Weather

Postby @weather_wa » Thu Jun 16, 2011 2:52 pm

Tornado time for north coast:

http://www.weatherzone.com.au/news/torn ... oast/17732

The weather bureau says this week's tornado at Red Rock, north of Coffs Harbour was not surprising given that the north coast is now in peak tornado time.

Michael Logan from the Bureau of Metrology says the weather patterns this time of year are favourable for tornados which often begin as a water spout.

The Red Rock event and last year's Lennox Head tornado both happened in June.

"There are a couple of similarities in the sense that both came in from off the water and we do at this time of the year see a fair bit of water spout activity up and down the new south wales coast and that's just because the conditions are right at this time of the year," Mr Logan said.

He explained that the water spouts often need the combination of unstable air but also they need the contrast of warm waters.

But are we seeing more of these events on the north coast?

The bureau says it is unclear if there are more tornados happening on the north coast or just more people seeing them.

Michael Logan says tornados are a definite feature of the north coast.

He says there are historical accounts of tornados but there are other factors which affect the reporting of the events.

"In more recent times the reports have become more frequent in that we have more incidents in the database but it is hard to work out if we have more occurring or if it just that we have much bigger population densities in these areas and also as we move into the digital age it is also much easier for people to record these features," Mr Logan said.


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Re: Eastern Australian Weather

Postby @weather_wa » Tue Jul 05, 2011 5:17 pm

Strong winds rip roofing from homes:

http://www.weatherzone.com.au/news/stro ... omes/17948

Emergency crews have spent the day clearing trees and debris from roads and homes after high winds swept across Victoria.

Gippsland, Ballarat and parts of Melbourne's bayside and eastern suburbs have been the worst affected.

State Emergency Service spokesman Stephen Warren says the organisation has responded to about 200 requests for assistance.

"Some have been trees down on roads; there's been some building damage where parts of buildings ... roofing has been ripped off," he said.

"But they have been very generic as what you would have for a severe storm. Nothing of any significant building damage but enough to cause problems for residents."

Mr Warren says residents should take the time to prepare for the winds.

"We'd ask people to take care out there, certainly shelter away from any trees make sure you park away from trees. Bring your items in to secure [them] and make sure you're aware of these severe storm conditions," he said.


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Re: Eastern Australian Weather

Postby @weather_wa » Tue Jul 05, 2011 5:18 pm

Hurricane strength winds blast Bass Strait:

http://www.weatherzone.com.au/news/hurr ... rait/17947

A deep low pressure system brought wild winds to southeastern Australia on Tuesday, with
Bass Strait experiencing 'hurricane-strength' winds.

The Hogan Island group which lies south of Wilsons Promontory had its highest wind gust
in three years, reaching an incredible 169km/h. Average wind speeds peaked at 128km/h
(69 knots), which is 'hurricane force' on the Beaufort wind scale.

The Beaufort scale was created in 1805 by Sir Frances Beaufort and is used to categorise
wind strengths at sea. This is the basis for our current marine warnings in Australia.
'Strong Wind Warnings' are issued by the Bureau of Meteorology when average wind speeds
exceed 25 knots, 'Gale Warnings' are issued for winds above 33 knots and 'Storm Wind
Warnings' are issued when average winds hit 48 knots. When average wind speeds exceed
64 knots they are considered 'hurricane force', with the sea turned completely white with
foam and spray. These winds are rarely experienced in Australia, outside of severe tropical
cyclone activity.

Winds weren't quite as extreme through the southeastern capitals but still reached gale-
force, with gusts of over 80km/h at Melbourne Airport and 80km/h around Sydney.

- Weatherzone

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Re: Eastern Australian Weather

Postby Lert » Wed Jul 06, 2011 8:01 am

Looks like its going to be a warmer day at Mt Hotham (vic).. Its already up to minus 2.8
2006 - 543.5mm, 2007 - 701.5mm, 2008 - 833.5mm, 2009 - 579mm, 2010 - 631.5mm, 2011 - 872.5mm, 2012 - 770mm

2013 Jan 5mm YTD 5mm

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Re: Eastern Australian Weather

Postby Pete » Wed Jul 06, 2011 9:08 am

Severe Weather Warning
for blizzard conditions
for people in the Australian Capital Territory and Snowy Mountains forecast districts

Issued at 11:02 am EST on Wednesday 6 July 2011.
Weather Situation

A deep low pressure system over the Southern Tasman Sea has moved east towards New Zealand overnight resulting in the westerly airflow easing over NSW though strong to locally gale force winds are expected to continue today. A second system, a strong cold front will cross eastern NSW early Thursday morning. Damaging gale force winds are expected to become more general over the warning area this evening and early Thursday.

Blizzard conditions are forecast for Alpine parts of the Australian Capital Territory and Snowy Mountains forecast districts.

The State Emergency Service advises that people should:

For emergency help in floods and storms, ring your local SES Unit on 132 500.

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Re: Eastern Australian Weather

Postby @weather_wa » Wed Sep 28, 2011 2:49 pm




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Re: Eastern Australian Weather

Postby @weather_wa » Wed Sep 28, 2011 2:50 pm

SA hit by storms and strong cold winds:

A cold shot of air and an area of severe storms has blasted most of the West Coast today and is heading towards Yorke Peninsula and Adelaide this afternoon and evening.

Ceduna was hit the hardest just before noon with very strong thunderstorms and a drastic cool change plus heavy rain. The rain was heavy enough to settle the dust with more than 14mm falling in just a few hours. The cool change was about as drastic with temperatures dropping nearly 8 degrees in 10 minutes just before noon. Wind gusts in Ceduna were clocked at 85km/h at about 11:30 while just a kilometres away, Thevenard recorded a 102km/h gust.

The system responsible for these storms is from the combination of a significant warm trough over northern SA and a very cold pocket of air coming off the Bight. The cold air will continue to track east over the coming days and reinforce the widespread showers and storms that are already occurring over most of southeastern Australia.

Adelaide is on target to be hit by a storm as early as this afternoon, more likely tonight

Some clearing will begin on the West Coast overnight but colder blustery southerlies will continue across much of southern SA for another few days.

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Re: Eastern Australian Weather

Postby @weather_wa » Wed Sep 28, 2011 2:51 pm

Flood Watch Issued For North East:

A flood watch has been issued for a number of north-east rivers and catchments.

The Bureau of Meteorology is predicting up to 50 millimetres of rain in parts, with higher falls on the ranges.

It is expected to cause significant stream rises with the possibility of minor flooding in the Goulburn and Broken Basins and north-east catchments tomorrow.

Bureau duty forecaster James Taylor says falls of up to 100 millimetres is possible.

"Over the 48 hours there's a reasonable chance we will see rainfall totals over catchment areas upwards of around 50 millimetres over the north-east districts, over the north-east ranges isolated totals of up to 100 millimetres is certainly not out of the question," he said.


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Re: Eastern Australian Weather

Postby @weather_wa » Wed Sep 28, 2011 2:52 pm

Severe Storms Brewing In The East:

Thunderstorms are becoming widespread through four states and have the potential to trigger heavy downpours and squally winds today.

The trigger for the storms is a deepening low pressure trough, which is edging east from South Australia. The storms forming along this trough are now spreading through western parts of Queensland, New South Wales and Victoria.

Strong northeast winds have been drawing a humid airmass from the Pacific Ocean into the nation's southeast. These winds are also warm, which is what kept Melbourne from falling below 19 degrees overnight. The warm, moist airmass will help to intensify these storms during the afternoon, with the potential for severe weather.

Victoria and New South Wales will be especially at risk of heavy downpours and associated flash flooding with storms. Strong upper level winds will also support the potential for damaging gusts with thunderstorms.

Melbourne is in the firing line for thunderstorms this afternoon. Winds have already been gusting to 78km/h at Tullamarine, but by this afternoon could become strong enough to damage property. Heavy rainfall is also a risk, which could make it a slow commute home from work.

- Weatherzone

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Re: Eastern Australian Weather

Postby @weather_wa » Wed Sep 28, 2011 2:54 pm

Storms to dump biggest rain since last summer:

Thunderstorms are about to deliver the biggest rain since last summer to much of western New South Wales, the ACT and Victoria, according to weatherzone.com.au.

"This region as a whole hasn't seen widespread 25-to-50 millimetre falls in a day since last summer's big floods. This is how much rain the western slopes, plains and ranges of NSW and northern and central Victoria are about to receive. In general, this rain will be very welcome. Crops are in need of a good drink after a fairly dry winter and start to spring," Weatherzone meteorologist Brett Dutschke said.

"But there's potential for 100mm in some parts, most likely northeastern Victoria and nearby southern NSW. Anywhere from Benalla to Mansfield to Bright to Gundagai is a chance," Dutschke said

"Despite the prospect of big rain, flooding is not expected to be on the same scale of last summer. The ground has become fairly dry with the lack of recent wet weather, so most rain will now soak into the ground rather than run off. Having said that, at least some minor flooding is guaranteed."

Melbourne won't be too far away from the heavy rain and storms. In fact there is a high chance of at least minor flash flooding today, enough to make this evening's commute home slow-going.

Canberra can also expect a thunderstorm during the evening. For anywhere east of the ranges, including Sydney, storms cannot be ruled out in the next 24 hours but they are less likely.

In addition to flash flooding, these thunderstorms in NSW, the ACT and Victoria will also produce damaging winds and may bring large hail.

"There's potential for trees and powerlines to be brought down, while hailstones may become large enough to damage cars and other property."

Powerful wind gusts have already been recorded today across Victoria, reaching 100km/h at Mt Hotham and 80km/h in Melbourne.

"A deep low pressure trough is the cause of these intense thunderstorms with help from moist northeasterly winds blowing off the Pacific Ocean. This trough will continue to head east and take the heaviest rain and storms off the east coast on Thursday. By then it will have also brought heavy falls to southern Queensland and Tasmania," Dutschke said.

"But that's not the end of the rain and storms. Another front will send in some colder air during Friday and the weekend, which will bring showers, storms and small hail. There will also be snow for the Alps."

- Weatherzone


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