UPDATED 10:55AM: The Bureau of Meteorology has issued a warning to sheep graziers in the South Coast, Central Tablelands, Southern Tablelands, South West Slopes, Riverina, Snowy Mountains and Australian Capital Territory forecast districts.
Issued at 10:34am (Tuesday, September 5), the alert says sheep graziers are warned that cold temperatures, showers and strong westerly winds are expected during Tuesday and Wednesday.
There is a risk of losses of lambs and sheep exposed to these conditions.
The next warning will be issued by 5pm Tuesday.
A severe weather warning remains in place for those in the Illawarra, South Coast, Central Tablelands, Southern Tablelands, South West Slopes, Snowy Mountains and Australian Capital Territory forecast districts.
A deep low pressure system south of Tasmania is driving vigorous westerly winds across southeast Australia.
Damaging winds averaging 60 to 70km/h, with gusts in excess of 90km/h, are possible over elevated parts of southeast NSW. The most likely period for the strongest winds is from late morning until evening.
Alpine areas above 1900 metres may experience winds averaging 80 to 90km/h, with gusts to around 110km/h.
Blizzard conditions are likely in these areas. The National Parks Service of NSW recommends that people consider postponing back country travel until conditions improve.
Locations which may be affected include Bowral, Braidwood, Goulburn, Bombala, Adaminaby and Nimmitabel.
The next severe weather warning will be issued by 5pm.