Temperatures are expected to drop between three to seven degrees below average and there have been lightening storms in Sydney, wild winds in south-east Queensland plus heavy rain in eastern Victoria and southeastern NSW.
The Blue Mountains west of Sydney could also see 1-2cm of snow this weekend, while parts of southern Queensland could even see sleet thanks to a seven degree drop in temperatures across Saturday and Sunday.
Emergency departments are asking people to take extra precautions as we wait this one out. This includes staying in as much as possible, wrapping up warm and heating your home.
WEATHER UPDATE: Cold, raining and storming in Sydney and other parts of the country. Keep warm. More soon. pic.twitter.com/MwOM5NH5TX