Roads currently closed in the Yass Valley Council area are Booths crossing on Yass River Road, Greenwood Road at Yass River and Low level crossing.

A vigorous low pressure system and associated cold front is expected to move through NSW on Thursday, September 28, with damaging winds forecast around the low pressure system as it moves through inland NSW, as well as with the front as it passes over the NSW ranges.

Widespread rain and showers and isolated thunderstorms are also likely with this system.

Damaging winds, averaging 60 to 80 km/h with peak gusts in excess of 110 km/h are expected about Alpine peaks from Wednesday night.

Damaging winds, averaging 50 to 70 km/h with peak gusts in excess of 90 km/h are expected to develop on Thursday morning in the far west of New South Wales, progressing through the central inland and central ranges in the afternoon. 

Moderate to heavy rain is expected to develop early Thursday morning over already saturated catchments about the Central West and the South West Slopes. This may lead to localised flash flooding. 

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. 

* Don't drive, ride or walk through flood water. 

* Keep clear of creeks and storm drains. 

* If you are trapped by flash flooding, seek refuge in the highest available place and ring 000 if you need rescue. 

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