The typhoon caused Causation significant damage Damaging to areas of the Northern Mariana Islands , which were buffeted by strong typhoon-force winds .

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

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 .