As a large rainband rolls over the country, heavy downpours are expected to strike practically every major city.
On Sunday, southeast Queensland and northern New South Wales will get the brunt of the thunderstorms, with up to 100mm of precipitation expected.
The majority of cities will experience precipitation, with showers predicted for Brisbane, Sydney, Melbourne, Adelaide, Canberra, and Hobart.
It follows hundreds of millimeters of rainfall over the weekend, with 325mm reported at Tin Can Bay in Queensland over the past 48 hours.
The eastern states have continued to experience flash flooding, with further flooding forecast and more than 100 warnings issued in NSW alone.
Downpours are expected to continue in several areas of the country and intensify throughout the following week.
Rob Sharpe, a meteorologist for Sky News Weather, has warned that conditions may deteriorate as the likelihood of an east coast low forming grows.
The extremely destructive weather system can bring gale-force winds and heavy downpours.
On Sunday, the Sunshine Coast is predicted to receive between 50 and 120 mm of precipitation, while Brisbane will receive between 80 and 120 mm and the Gold Coast 150 mm.
Byron Bay will receive between 70 and 120 millimeters, with a further 20 millimeters on Monday.
Grafton will receive 50-90mm on Sunday and 15-30mm on Monday, whilst Port Macquarie will have 30mm today and 40mm tomorrow.
On Sunday, Sydney will receive up to 10 mm of precipitation before the rain intensifies, bringing 20 to 35 mm on Monday.
Today will only see 5mm of precipitation in Melbourne, but tomorrow and Monday will have between 20 and 30mm, followed by 10mm on Tuesday.
As the Murray River soared over its 1993 peak, the Victorian border city of Echuca is witnessing the worst flooding in decades.
The river in the Victoria-New South Wales border town reached the 1993 level of 94.77m above sea level on Saturday night and peaked at 95m overnight.
Meanwhile, the SES received over 140 calls for assistance from Geelong to Hamilton in the state’s southwest.
Three individuals were rescued in Geelong after driving through floodwaters.
Since the weather emergency began, the SES has received more than 8,300 calls for assistance, including more than 750 flood-related rescue requests.
Up to 30,000 sandbags have been distributed in flood-ravaged regions of New South Wales as emergency services prepare for a “very busy” next 24 to 48 hours.
On Sunday before 6 p.m., residents of several streets in southwest Narrandera, Riverina Region, have been instructed to leave their homes.
Monday and Tuesday provide a potential flood risk for the Hawkesbury-Nepean, Lower Hunter, and Colo Rivers, according to forecasters.
In addition to the 100 defence personnel now stationed in the central-west and the 50 stationed in the Hunter region, up to 200 soldiers will be sent to Dubbo, Moree, and the Northern Rivers.
“We are practically burying the state in sand,” said NSW Emergency Services Minister Steph Cooke.
“I am concerned about each and every region of New South Wales.” It is essential that everyone remain vigilant.
Mr. Sharpe anticipated that conditions would improve during the week as the low-pressure system moved offshore.
‘After this event dissipates in the southeast, we may anticipate a return to dry conditions,’ he said.
Yes, there will still be some showers and storms, especially in the interior northern regions of the country.
‘However, the risk will diminish for at least a few days in the east, with only a slight chance of rain beginning Friday for future severe thunderstorm activity.