Heavy thunderstorms are expected over south-east Australia over the weekend, with some parts at risk of flooding.
A deep low-pressure area south of The Bight will push a series of cold fronts and troughs across several states, according to the Bureau of Meteorology.
The first front crosses Victoria, NSW and Tasmania on Thursday, bringing thunderstorms expected to intensify over the western slopes of the Great Dividing Range.
Severe thunderstorms may develop over NSW and South Queensland, bringing potentially damaging winds, large hail and heavy rain.
The front will then move into the Tasman Sea on Friday, but another front of thunderstorms in southern South Australia is expected to move across Victoria, Tasmania and southern NSW on Friday.
Rain will continue over the weekend over Victoria, Tasmania, South NSW and South East SA.
High temperatures are expected to be 4-8°C below average over the weekend, while snow depths are expected to drop to around 1100-1200m.
Rain is expected to lead to renewed river surges, particularly over parts of NSW, north-east Victoria and north-east Tasmania.
Flood warnings are in place for inland NSW, South Queensland and North Victoria.
Severe thunderstorms are a risk for the remainder of Thursday, particularly over inland parts of NSW and south Queensland.
Warnings may be issued for severe storms that can result in flash flooding.
Windy conditions are also expected to develop but are expected to remain below warning levels.
The weather system is also likely to cause large waves and high tides along the south coast of SA and south-west Victoria.
It could create hazardous conditions for some coastal activities, the bureau warned.