 An upper level low <unk> westward across the tropical Pacific ocean beginning on July 4 . On July 8 , a tropical disturbance formed southeast of the upper low southwest of Enewetak Atoll . The system moved westward , slowly organizing . Becoming a tropical depression on July 13 , the small system turned northwest , recurving gradually around a subtropical ridge to its east and northeast . The system strengthened into a tropical storm later on July 13 , and a typhoon on July 14 to the south of Japan . After turning to the northeast , the system began to experience northeasterly vertical wind shear and began to weaken . After passing east of Okinawa , the system began to transition into an extratropical cyclone , a process which completed on July 17 near the southern coast of Japan . 
