Wagner capped her prep career with District 13-3A MVP accolades after tallying 505 kills and 111 digs during her senior season. She amassed 1,332 kills and 828 digs and two all-state honors in three seasons playing for Mount Vernon High School. She helped lead the Tigers to district titles as a junior and senior. Wagner was also a member of the MVHS track and field and softball teams. She played club with East Texas Juniors.
Savannah is the daughter of Jeff and Lesley Wagner, and has a younger brother, Cody. Her father was an MLB draftee in 1981. Wagner is planning to major in nursing at Arkansas.