Gale force winds are set to hit parts of NSW, prompting a warning for residents to beware of falling trees and power lines.

The Bureau of Meteorology (BoM) on Monday issued a Severe Weather Warning for the Hunter, Illawarra, South Coast, Central Tablelands, Southern Tablelands and Snowy Mountains.

The areas can expect damaging wind gusts over 90 km/h to develop during the late morning and into the afternoon as "a vigorous cold front" moves over central NSW to the east, the BoM says.

The State Emergency Service (SES) has advised people to take precautions ahead of the wild weather, such as moving vehicles under cover or away from trees, securing loose items around the house, and keeping clear of fallen power lines.

Residents should also avoid floodwater, keep clear of creeks and storm drains and beware of fallen trees or debris on the road, the SES said.

Damaging winds averaging over 80 km/h, with gusts to 120 km/h are also forecast for Alpine areas above 1800 metres, possibly leading to blizzard conditions.

An earlier Severe Weather Warning for the South West Slopes, Mid North Coast, Northern Tablelands, North West Slopes & Plains and Central West Slopes & Plains has been cancelled.