Vicki Davey: Urgent search for missing woman who disappeared on a bushwalk at Glenrock nature reserve in the Lake Macquarie area

An urgent search is underway for a woman who disappeared while on a bushwalk.

Vicki Davey, 63, from the Lake Macquarie area in NSW, was last in contact about 11.30am on Wednesday

Police were alerted when she could no longer be contacted and began looking into her whereabouts.

There are serious concerns for her welfare as she lives with conditions which require treatment. 

Ms Davey is described as being of Caucasian appearance, about 150cm tall with a slim build, and has blonde-grey hair in a bob.

She was last seen wearing jeans, a jumper and joggers.

Police believe she may have gone for a walk in the Glenrock nature reserve at Kahibah.

An search led by police and supported by SES was launched at 8am on Thursday.

Anyone with information into her whereabouts is urged to call police or Crime Stoppers on 1800 333 000.