According to weather forecasting service, Weatherzone, the strong cold front will bring rain, hail, thunderstorms, damaging winds and low-level snow today.
Weatherzone said the burst of cold air will be accompanied by blustery winds, with severe weather warnings for damaging gusts in place for parts of Victoria and New South Wales.
Showers and thunderstorms will affect parts of Tasmania, Victoria, South Australia, NSW and the ACT and rain will be falling as snow on the higher parts of the alps.
Snow is forecast to reach down to an elevation of 500 metres in Tasmania. On the mainland, snow could reach down to 600m in Victoria and 700m in southern NSW and the ACT today.
The mix of cold and windy weather has also prompted sheep graziers warnings, road weather alerts and bush walker's alerts in parts of NSW, Victoria, SA and Tasmania.
Weatherzone predicts the wind and showers should taper off from Thursday as the front moves out into the Tasman Sea.