A severe weather warning has been issued for parts of NSW, with damaging wind gusts of up to 90 kilometres an hour expected to wreak havoc on trees and powerlines.
The Bureau of Meteorology issued the severe weather alert for the Snowy Mountains and parts of the NSW South Coast and the Southern Tablelands on Thursday.
Damaging winds of up to 90 kilometres an hour are expected in those regions until mid-evening.
The winds are brought by a low pressure trough, which is moving through parts of NSW and the ACT and also brings the potential for severe thunderstorms.
Sydney, the Illawarra and Central Coast won't miss out, with mid-afternoon storms forecast there as well.
Meteorologist David Wilke said anywhere south of the mid-north coast should be prepared for bad weather.
"Wind gusts really are the main concern today for anywhere along the coast south of about Port Macquarie, and then also the Central Tablelands, Southern Ranges and parts of the inland north," he said.
"At this stage hail is looking reasonably unlikely, just because of how fast the storms are moving (but) it's not out of the question. It's something we'll be monitoring through the day."