You might want to keep the umbrella handy with some parts of Australia's east coast possibly receiving upwards of 300mm of rain.
Eastern parts of Victoria and the NSW South Coast are due to be walloped by the low-pressure system from Wednesday evening through to Friday night.
Weatherzone meteorologist Brett Dutschke told Yahoo News Australia areas along the south coast including Bega, Merimbula and Narooma were in for a drenching.
“There’s the potential for 150mm to 300mm over two or three days,” he said.
“But most of the rain will be between tomorrow (Thursday) and Friday. We also have the chance for over 300mm.”
According to the Bureau of Meteorology, Merimbula and other surrounding areas along the coast could receive up to 70mm on Thursday and 35mm on Friday.
Sydney won’t exactly cop the same deluge but up to 30mm could fall on Thursday and 15mm on Friday while Canberra can expect similar rainfall on both days.
Mr Dutschke added the system would stretch south towards Victoria where it could reach areas around Mallacoota and as far west as Gippsland.
Orbost, in the Gippsland region, will cop up to 25mm Thursday and 45mm Friday.
Residents in Melbourne will be spared the heavy rainfall though with just 4mm forecast for Thursday and cloudy conditions with little to no rain on Friday.
South East Queensland will largely escape the heavy rain too but it won’t be smooth sailing for the Sunshine State with Brisbane forecast for three days of storms from Wednesday.
Up to 15mm of rain is forecast on Thursday and 8mm on Friday.
Mr Dutschke said the system affecting the NSW South Coast and eastern Victoria “is pretty unusual” for this time of the year.
“It’s a bit late in the year. Typically you see this in winter,” he said.
Perth continues to swelter
While the east coast is drenched, the west coast is going through its hottest early December week in 90 years.
Mr Dutschke said Perth has exceeded 31 degrees five times in the past five days. It is forecast to possibly reach 40 on Thursday and 35 on Friday.
“That would make it seven 31-degree days which has not been experienced since 1931,” he said.
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