Damaging winds averaging 60 to 70 km/h with peak gusts in excess of 90 km/h are expected to develop in the far southeast from late Monday, then extend north during Tuesday, affecting the central parts of the coast including the Sydney Metro during the Tuesday morning, and the rest of the warning area in the north by the early afternoon.
Areas most affected by the damaging winds will be the coastal fringes and the higher parts of the ranges. Wind gusts across the Alpine peaks may reach 125 km/h late Monday and early Tuesday. Winds then are expected to gradually ease from the south during Tuesday afternoon.
Heavy surf, in excess of 5 metres in the surf zone, may lead to localised damage and coastal erosion along the south coast from late Monday and extend further north during Tuesday.
People are advised to stay well away from the surf and exposed areas. South facing beaches will be the most affected.
A combination of gale force winds and snowfalls may lead to blizzard conditions across Alpine areas from Monday evening into Tuesday morning.
Locations which may be affected include Port Macquarie, Taree, Gosford, Sydney, Wollongong, Nowra and Batemans Bay.
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.