Aussies are being warned to brace for rain, storms and plunging temperatures this week as an upper low changes conditions across multiple states.
The Bureau of Meteorology (BOM) said parts of south eastern Australia can expect heavy rain this week.
“Rug up #Victoria, there's a wintry blast on the way! Showers, thunderstorms & strong winds are expected overnight & on Tuesday,” the BOM said in a tweet.
Heavy falls are forecast in eastern Victoria and south eastern NSW, the ACT and Queensland.
The maximum temperature on Tuesday in Sydney will be 21 with rain, while in Melbourne it will be a chilly 15 degrees, with a 95 per cent chance of rain.
Canberra will reach just 16 degrees, with a high likelihood of rain. Brisbane will be warmer at a maximum of 26, with the chance of thunderstorm.
The falls will be driven by a low system, or “an upper level pool of cold air, approximately 5km above ground”.