The Bureau of Meteorology has released a second weather warning as arctic blasts sweep across the state.

An approaching cold front is generating vigorous northwest to southwesterly winds. This front will cross the state later tonight and during Saturday. Winds are expected to ease later on Saturday.

Damaging winds are expected to average 60 to 70 km per hour for parts of the Southern Highlands.

Winds will gradually ease during Saturday following the passage of the cold front.

Blizzard conditions are currently forecast to ease during Saturday. The NSW National Parks and Wildlife Service recommends that back country travel be postponed until conditions improve.

Locations which may be affected include Bowral and Goulburn.

High winds were recorded in Moss Vale at a speed of 96 km per hour at 4:47 am on July 11, while wind gusts of 91 km per hour were recorded at High Range at 5:28 am and 11 am on July 11.

The State Emergency Service advises that people should move vehicles under cover or away from trees, secure or put away loose items around your house, yard and balcony, keep at least 8 metres away from fallen power lines or objects that may be energised, such as fences.

Report fallen power lines to either Ausgrid (131 388), Endeavour Energy (131 003), Essential Energy (132 080) or Evoenergy (131 093) as shown on your power bill.

For emergency help in floods and storms, ring your local SES Unit on 132 500.

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