Shauna was last seen on Monday (13 April) afternoon at Hillside train station boarding a Liverpool bound train. She was reported as missing later that day.
There has been no contact with her since Monday and her family and are extremely worried.
Shauna is described as being white, 5ft 4 ins tall of a slim build with collar length dark brown hair and a fair complexion.
She was last seen wearing a yellow jumper, dark leggings and black boots. She was also carrying a colourful rucksack. Shauna may well have changed her clothing since Monday.
Shauna is known to frequent the Sefton and Liverpool areas and she has links to Lancashire.
Shauna’s family and the police are becoming increasingly concerned for her safety.
Shauna, or anyone who has seen her or knows of her whereabouts, is asked to call Merseyside Police on 0151 777 3416, 101, or the Missing Persons Bureau on 116 000.