Typhoon Goni, known in the Philippines as Typhoon Ineng, was a powerful tropical cyclone that affected much of East Asia in late August 2015. Developing in tandem with Typhoon Atsani to its east, Goni formed on August 13, and passed through the Mariana Islands two days later. By that time, radar imagery showed a formative eye, signaling an rapidly intensifying storm. Goni evolved into an intense typhoon in the Philippine Sea before weakening and stalling north of Luzon. The typhoon re-intensified and attained peak winds of 185 km/h (115 mph) on August 23 while moving through the southern Ryukyu Islands. Goni weakened slightly and moved across the Japanese island of Kyushu. The tropical cyclone transitioned into an extratropical cyclone in the Sea of Japan on August 25, crossed into eastern