As a deep low-pressure trough batters the state with wild winds and chilly temperatures, snow is set to fall across large swathes of ACT and the NSW Central and Southern Tablelands.
The trough has developed over the past 24 hours in south-east NSW and extends into the Southern Ocean, and is likely to continue until Monday
Jane Golding of the Bureau of Meteorology on Thursday said the system would carry strong winds with gusts reaching 90 km / h, cold temperatures and snowfall.
In Orange, Lithgow, Goulburn, Oberon, Jenolan Caves, the Blue Mountains and the highlands around Bathurst, snow is expected to fall over the weekend, Ms Golding said. Snowfall is likely to occur in areas above 500 m above sea level.
The ACT and Snowy Mountains area could also receive a dusting, and the potential for blizzards and avalanches has been warned to skiers heading to the NSW snowfields.
Ms Golding said it was a one-in-15-year weather event.
“We’ve already seen the start of that with some pretty gusty winds develop over a lot of NSW, those winds kicked up some dust over western NSW,” Ms Golding told reporters.
“Over the next four days those winds are really continuing, some days windier than others.”
On Thursday, a transportation for NSW spokesman cautioned that snow could cause road closures and fallen trees, but said that an effort would be made to retain access.
There is also a extreme weather warning for the districts of Hunter, Illawarra and portions of the Mid-North Sea, the South Coast, Central Tablelands and Southern Tablelands.
A woman in her 50s was injured on Wednesday in Gosford on the Central Coast after heavy winds caused her to fall by scaffolding at a construction site.
On Thursday, the SES also warned that residents at St Georges Basin in Sussex Inlet who had just cleaned up from recent floods could be flooded by high tides again on Thursday.