Source: Bureau of Meteorology

For people in Illawarra, South Coast, Central Tablelands, Southern Tablelands, Snowy Mountains, Australian Capital Territory and parts of Mid North Coast, Hunter, North West Slopes and Plains, South West Slopes and Northern Tablelands Forecast Districts.

Issued at 10:27 am Friday, 11 May 2018.

VIGOROUS WINDS EXPECTED TO DEVELOP ABOUT THE RANGES TODAY

A complex low pressure system over the southwestern Tasman Sea is deepening and is directing vigorous west to southwesterly winds across southeastern Australia. This low will slowly move east during Saturday and Sunday and winds are expected to gradually ease.

DAMAGING WESTERLY WINDS, averaging above 65 km/h with peak gusts in excess of 90 km/h are expected to develop from late this morning along the New South Wales ranges and through the Illawarra district.

A GUSTY SOUTHERLY WIND CHANGE is then expected to move into southern New South Wales later this evening.

In alpine areas above 1900 metres, southerly winds are expected to average above 80 km/h with peak gusts in excess of 120 km/h following this change. BLIZZARD conditions are possible about alpine areas above 1700 metres with these winds. The National Parks Service of NSW recommends that people consider postponing back country travel until conditions improve.

Overnight tonight and into Saturday these vigorous southerly winds will extend up the South Coast district.

At this stage, the wind is expected to gradually ease from Saturday.

From later this afternoon and evening HAZARDOUS SURF conditions are expected to develop over Eden, Batemans and Illawarra coasts and then extend to Sydney, Hunter, Macquarie and Coffs coasts during Saturday. The direction of the largest waves in these areas is expected to be predominantly from the south. DAMAGING WAVES in excess of 5 metres are possible on Saturday morning along stretches of the coast south of Kiama exposed to southerly waves.

Locations which may be affected include Nowra, Sussex Inlet, Batemans Bay, Armidale, Tenterfield, Orange, Mudgee, Bathurst, Katoomba, Moss Vale, Canberra, Goulburn, Cooma, Thredbo, Mount Ginini and Yass.

VERY HEAVY SURF which may lead to localised damage and coastal erosion is ... possible/likely/expected ... describe location and timing ...

Beach conditions in these areas could be dangerous and people should stay well away from the surf and surf exposed areas.

Locations which may be affected include Nowra, Batemans Bay, Armidale, Orange, Canberra and Goulburn.

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 on 131 388, or Endeavour Energy on 131 003 or Essential Energy on 132 080, as shown on your power bill.
* For emergency help in floods and storms, ring your local SES Unit on 132 500.