 Around the time that Soudelor became a typhoon , it began moving toward the north , influenced by an approaching trough , and it passed about 95 km ( 60 mi ) northeast of Luzon . A ragged eye developed early on June 17 , which quickly became better organized . With its outflow enhanced by the approaching trough , Soudelor rapidly intensified to the east of Taiwan . The typhoon struck the Japanese island of Iriomote @-@ jima at around 2030 UTC on June 17 . At 0600 UTC on June 18 , the JTWC estimated peak 1 ‑ minute winds of 215 km / h ( 135 mph ) . At the same time , JMA estimated peak 10 ‑ minute winds of 150 km / h ( 90 mph ) when it was located west of Okinawa . While at its maximum strength , Soudelor had a circular eye 33 km ( 21 mi ) in diameter . It turned to the north @-@ northeast , maintaining its peak winds for about 12 hours before increased shear from the westerlies caused weakening . The eye quickly dissipated , and the system began transitioning into an extratropical cyclone . Early on June 19 , the JMA downgraded Soudelor below typhoon status , and the storm later crossed between Japan and South Korea into the Sea of Japan . At 1500 UTC that day , the JMA declared the storm as extratropical while it was near the Oki Islands ; the JTWC followed suit three hours later . The extratropical remnants of Soudelor continued to the northeast , crossing northern Japan on June 20 . The storm slowed and turned to the east , dissipating on June 24 . 
