A tropical disturbance persisted in the monsoon trough northwest of Pohnpei on June 7 , and moved westward without development due to wind shear . On June 11 , the shear decreased enough to allow the convection to organize , and the next day the JMA classified it as a tropical depression northeast of Palau . On June 13 , the JMA upgraded it to Tropical Storm Soudelor to the east of the Philippines , and PAGASA gave it the local name " Egay " . Soudelor moved to the northwest and later to the north , parallel to the eastern Philippines , and on June 17 , the JMA upgraded it to typhoon status . The storm rapidly intensified to the east of Taiwan as it developed a well @-@ defined eye , and while doing so passed over 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 ) , while the JMA estimated peak 10 minute winds of 150 km / h ( 90 mph ) . Increased shear weakened the typhoon to tropical storm strengthen on June 19 , and later that day the JMA declared the storm as extratropical near the Oki Islands . The extratropical remnants of Soudelor continued to the northeast , crossing northern Japan on June 20 and dissipating on June 24 .