The Bureau of Meteorology has issued a severe weather warning for most of the Hunter.

Damaging winds, averaging 60 to 70 kilometres per hour with peak gusts in excess of 90 kilometres are forecast to develop across the southeast during Friday, extending northwards to parts of the Hunter by late Friday or early Saturday.

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 eight 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. 

The next warning is due to be issued by 5:30 pm.

Warnings are also available through TV and Radio broadcasts, the Bureau's website at www.bom.gov.au or call 1300 659 218.