Storm Cooper-Ryan, 17, has been missing for three days

Police are appealing for help in finding missing teenager Storm Cooper-Ryan, who has been missing since Tuesday.

The 17-year-old girl was last seen in Heddon Greta, west of Newcastle, at around 4pm on Tuesday.

Officers from the Port Stephens-Hunter Police District were notified on Thursday after they could not be located or contacted.

“The police and her family are seriously concerned for her welfare,” police said Friday.

Storm is described as having a light complexion, a slim build, and blond hair.

She is about 155 cm tall.

She regularly visits Metford, Maitland and Sydney.