The victim was walking home from school in the 1000 block of Catalpa Way near Baywood Drive at about 3:15 p.m. when an unknown man in a vehicle pulled up alongside her, police said.
The man stopped his car and called out to the victim, who turned toward him. The suspect then exposed himself to the victim before driving away, police said.
Officers searched the area for the suspect but were unable to locate him.
The suspect is described as a Hispanic man between 20 and 30 years of age with short black hair and a mustache.
The suspect vehicle was described as a light blue or green Honda or Toyota, police said.