 After affecting the Philippines , Soudelor moved into an area of low wind shear and with favorable outflow . It became a typhoon on June 17 , and quickly developed an eye while rapidly intensifying . The storm struck the Japanese island of Iriomote @-@ jima , where wind gusts reached 204 km / h ( 127 mph ) . It also affected Taiwan , where floods covered highways and caused mudslides . Early on June 18 , Soudelor reached peak 10 ‑ minute sustained winds of 150 km / h ( 90 mph ) . Subsequently , an increase in shear and the passage of a trough weakened the typhoon and caused it to turn to the northeast . Soudelor weakened to a tropical storm on June 19 , and subsequently it passed between Japan and South Korea . It became an extratropical cyclone that day , dissipating on June 24 . In Japan , the storm caused widespread power outages , although damage was minimal , and there were 21 injuries . In South Korea , there was $ 12 @.@ 1 million in damage and two deaths . 
