[1][2][3] Early on August 17, as the system moved south-eastwards along the subtropical ridge of high pressure, the United States Joint Typhoon Warning Center (JTWC) initiated advisories on Maring and designated it as Tropical Depression 12W.

[4] Maring began to interact with Tropical Depression 13W north of it and a small high-pressure in the middle of the two storms, exhibiting a Fujiwhara Effect.

[5] On August 18, 12W strengthened into a tropical storm, which JMA identified it as Trami, while steadily tracking generally eastwards.

[1][7][8][9] Over the next couple of days the system passed through the Chinese provinces of Jiangxi and Hunan as it gradually weakened into a tropical depression.

[10][11][12][13][14][15] The NDRRMC quickly mobilized units from the military and its reserves in response to critical areas being hit by rising floodwaters.

[18][19] On August 21, gale-force winds struck heavily populated areas in northern Taiwan as Trami tracked in a westerly direction.

[21] Trami continued to move west, and made landfall in the Fujian province of China on August 22, 2:40 a.m. local time.