UPDATE 12.45pm: ANY snow to fall on NSW's north east corner is unlikely to get any further east than Tenterfield, a local weather expert has said.

Michael Bath of Northern NSW Severe Weather said the cold weather system tipped to hit Australia at the weekend may deliver snow to areas such as Tenterfield, Guyra, Ben Lomond, and Glen Innes.

However, he said the snow was unlikely to make it as far east as Tabulam, Drake, or Bonalbo.

While at the moment it appeared likely there would be snow Sunday and early next week, it was difficult to say with certainty this early where, or even if, it would snow.

"The weather models will change a fair bit before then," he said.

Mr Bath said Northern NSW Severe Weather chose not to post forecast's of snow because of that uncertainty.

The outlook for the weekend and start of next week would be clearer around Friday.

INITIAL REPORT: YOU thought it was already here, but winter is coming and will arrive this weekend.

Billiing is as "the biggest most significant/severe winter weather system this year"  Higgins Storm Chasing is forecasting two intense low pressure systems will combine to break low temperature records and bring snow in a wide swathe, reaching almost as far north as Brisbane.

On the Northern Rivers, we can hope to see snow from Sunday around Tenterfield, potentially reaching as far east as Drake and Bonalbo, with the system continuing into next week.

The system is expected to bring snow to 1100 metres across the ranges, Higgins says.

MORE: Five fun things to when you suddenly find yourself in snow

On Saturday, the cold fronts are expected to be less magical, bringing damaging winds, storms, and possibly hail to NSW's Western, Central inland, Southern and South East districts.

Higgins Storm Chasing says the estimates of where and when snow will fall will be updated closer to the event.

However, it says snow looks likely across parts of NSW, Queensland, South Australia, Tasmania, and Victoria.

Even those areas not expecting snow will need to rug up. The weather group is predicting daytime temperatures to sit as much as 10C lower than normal.

Still, it could be worse.

The imaging Higgins is using to base its forecast show temperatures at 20,000 feet as low as -35C.