Tiana Hill - Please help her family find her.

Hey YCMs.  My friend's niece, Tiana Hill, went missing on January 18th.  She's 15 years old and attends Washington High School in Milwaukee, WI.  She went to school and made it to all of her classes but never came home.  The first 48 hours are the most crucial in a missing persons case.  Please help Tiana's family find her. 
This is information from Tiana's family about what she was last see wearing:

My niece has been missing since Tuesday, Jan 18. Her name is Tiana Hill. She goes to Washington H.S in Milwaukee and she's a sophomore. She wears glasses.

Height: 5'2-5'3
Weight: 140lbs-150lbs
Hair color: black
Eyes: brown
Piercing: on the left side above her upper lip
Last seen wearing: Dark brown boots, dark blue jeans, brown polo shirt w/ black & red checker board vest & black coat.

If you have any information, please contact the Milwaukee Police Department, District #7 at 414-935-7272.