Typhoon Dolphin was a powerful tropical cyclone that produced Creating the first typhoon-force winds on Guam since Typhoon Pongsona in 2002 .

The seventh named storm of the 2015 Pacific typhoon season , Dolphin formed Coming_to_be on May 6 in the vicinity of the Federated States of Micronesia ( FSM ) .

Dolphin intensified Cause_change_of_strength into a typhoon before passing between Guam and Rota on May 15 , producing Creating typhoon-force winds on both islands .

Dolphin turned Becoming to the northeast and weakened Cause_change_of_strength , becoming Becoming extratropical on May 20 and exiting Departing the western Pacific basin on May 24 .

Dolphin damaged Damaging 390 houses , including nine that were destroyed Destroying , leaving Departing 1,055 people homeless .