(AUSTRALIA) JUST IN: Melbourne/Perth has broken its record for the longest stretch of days over 40 degrees Celsius with up-to 10 million who will find themselves in a scorching heatwave over the coming days as temperatures in four capital cities skyrocket to up to 10C or more above average #AceNewsDesk report

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#AceNewsReport – Jan.23: It develops down the west coast and when it sits offshore it causes north-easterly winds to bring down hot, dry air from inland and northern parts of WA, down the west coast and down into the south-west,” she said.

#AceWeatherDesk says according to the local media news report: Melbourne, Perth, Adelaide weather: 10 million forecasts to swelter in multiple heatwaves by News AU’s

This has only been set three times in history: between December 25 and 28 last year, in February 2016 and February 1933.

Australian Open players will have to suffer through multiple days in Melbourne peaking past 30C while Perth could break an all-time record for the number of summer days above 40C.

The weather in Tasmania and much of South Australia will also be in heatwave conditions, but in SA the soaring mercury will coincide with a “torrent” of rain, forecasters have said, which could be the heaviest seen in more than 10 years. 

“It is going to be a hot end to the week,” said Sky News Weather meteorologist Alison Osborne. 

On the east coast the heat will be less stifling but it could be wet with storms and showers heading from New South Wales into Queensland. 

Heatwave conditions are expected across many populated parts of Australia. Picture: BOM.

The continent currently has two expansive heatwaves powering up. One extends from South Australia into Victoria and Tasmania and the other is a 2500 kilometre monster stretching from near Broome down the entire coast to WA’s populated south west including Perth. 

The Bureau of Meteorology has classed much of the heatwave as “severe”. The definition of a heatwave is unusually hot maximum and minimum temperatures over a three-day period at a location.

A severe #Heatwave will grip the southwest of #WA for much of this week. Forecast temperatures will be 4-12°C above average. Some warm nights ahead too – not much relief from the hot days until later in the weekend. Take care in the heat, stay hydrated. See @WAHealth for tips. pic.twitter.com/kCNRtZFhqy— Bureau of Meteorology, Western Australia (@BOM_WA) January 18, 2022

“Daytime temperatures are likely to top 40C around the Perth area again on Friday which will make it the eighth day so far this summer to exceed the 40C mark, said Ms Osborne. 

“That’s never happened on record for summer in Perth. It has been a sweltering season.”

Thursday could peak at 39C in Perth and then 40C on both Friday and Saturday. Lows will be above 20C.

Margaret River could reach 36C on Friday with Port Hedland getting to 42C. 

40C plus in Perth, 34C plus in Melbourne and Adelaide. Picture: BSCH.

South Australia to see heatwave and rain event

Across the Nullarbor and South Australia is contending with both a heatwave and a rain event.

“It’s going to be hot and humid … but a torrent is on the way for South Australia,” said Ms Osborne.

That heavy rainfall will be first focused over the west coast and then the Eyre Peninsula extending into the pastoral districts. 

These regions are now on flood watch with significant inundation a very real risk.

Some places could see 50-100mm with isolated falls of 150mm in the next three days. Average rainfall for those areas is between 50-100mm all summer. 

The wettest day for Adelaide could be Sunday. But the city is now forecast to miss most of the moisture with perhaps only 10mm falling on Sunday and then a few showers in the following days. 

Adelaide won’t miss the heat though, with the city tottering around maximums of 35C until Sunday when the mercury could fall just below 30C.

Friday could be very wet for central parts of South Australia. Picture: Sky News Weather.

Australian Open could see stifling heat

That heatwave, in parts severe, will creep into Victoria from Thursday covering much of the state as well as Tasmania until Tuesday. 

In Melbourne, the mercury will peak at 30C on Thursday and then steadily climb to 34C on Sunday. Overnight lows will be around the high-teens or low twenties.

It will be dry in Hobart and getting warmer. A high of 23C on Thursday and then hitting 27C on Sunday with mid-teen minimums. 

Warming up in Canberra too. A high of 21C on Thursday and then 25C maximums on the weekend and up to 28C on Monday. Minimums should be around 11C.

Parts of SA could see its heaviest rain in a decade, forecasters have warned. Picture: Sky News Weather.

Wet and stormy on east coast

“On the east coast, south-easterly winds are helping to make for a fairly gloomy and showery day again for NSW but the heaviest falls today and tomorrow are more likely north of Coffs Harbour and then up into southeast Queensland,” Ms Osborne said. 

Sydney is now stuck around the 25-27C high level for the next few days and the weekend, with warmer days next week but still average for January. 

Soggy in Brisbane with 10-25mm on Thursday with a possible storm and then not-so heavy falls into the weekend. 

Temperatures will stall around the 28C mark and 20C at dawn until the weekend is done. 

Darwin will see heavy rain and storms most days with between 10-20mm of rain. The city will top out at 32C.

ABC News Report: Perth smashes heat record, recording fifth consecutive day over 40C, with another scorcher forecast for Sunday and at 1:10pm on Saturday, the temperature reached 40.1 degrees for the fifth day in a row, breaking the previous record of four days.

The maximum temperature for Perth is expected to drop to the low-30s by Monday.(ABC News: Andrew O’Connor)

But duty forecaster Jessica Lingard said with a 39-degree maximum forecast for Sunday, it was unlikely the record would be broken again.

“There is a slim chance, but we have all got our fingers crossed that it’s a little bit cooler,” she said.

Ms Lingard explained the hot weather had been caused by a west-coast trough, a fairly common feature of summer in Perth.

“What we’ve seen over the last couple of months is these west-coast troughs lingering about the coast for several days, whereas in a normal season we might expect them to develop, only linger for a day or two.”

Relief in sight

Thankfully, that system should bring cooler temperatures as it moves onshore.

That is expected to happen on Sunday, with temperatures in the low 30s forecast from Monday, including 31C on Australia Day.

Little over halfway through summer, Perth has also broken the record for the highest number of days over 40C between December and February.

So far, 10 days have broken that mark this summer.

The previous record was seven days, set over summer in 2015/16.

Even looking at a longer period between November and March, only seven days were hotter than 40C across 2006/7 and 2019/20.

On average, December only has one day over 40C, while February has 1.2.

Relief may be short-lived

Ms Lingard said we could expect this summer’s numbers to climb.

“We do have another hot period forecast for next weekend, with temperatures increasing again,” she said.

“This will not be the last hot period that we see for the summer period.”

The break from scorching hot weather in Perth is expected to be short-lived with another hot weekend forecast for next week.(ABC News: Hugh Sando)

Ms Lingard said it was difficult to say why the systems were hanging around for longer, although there were some theories the bureau was considering, including weaker than usual synoptic patterns.

“We haven’t had any tropical lows moving through or tropical cyclones moving through the Pilbara region, nothing to really flush out the heat in that area,” she said.

But she said it was not possible to put the heat down to global warming at this stage.

“There are several factors involved that may not be specifically climate change-related,” she said.

“This may just be a season where we don’t get too many cyclones through the north-west, they all seem to be off the coast or in the eastern states.

“But if we look back to the State of the Climate report that the CSIRO and the Bureau wrote in collaboration in 2019, they discovered that there had been a warming of 1.4 degrees.

“If we take into account that background warming, these hotter temperatures are looking more likely.”

Heat felt across the state

The particularly warm summer period has not been limited to Perth, with high temperatures recorded across the state.

Last week, the small beachside town of Onslow in the Pilbara equalled Australia’s hottest day on record when the temperature peaked at 50.7C.

“We have seen extreme temperatures all the way down into the south-west around the Margaret River region,” Ms Lingard said.

“We’ve also seen some very hot temperatures through Geraldton and up around Carnarvon and Coral Bay as well.

“Temperatures through western parts of the Pilbara and western parts of the Gascoyne have been quite extreme over the last couple of months, with temperatures in the mid to high 40s.”

#AceNewsDesk report ……….Published: Jan.23: 2022:

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