At the same day, it gained the name Phanfone due to very favorable conditions and intense thunderstorms rich with convection surrounding the storm's center.

[4][5] After the JMA also upgraded Phanfone to a typhoon at noon on October 1, the system started to deepen more rapidly when tracking along the southwestern periphery of a deep-layered subtropical ridge.

[6] Under low vertical wind shear and good dual channel outflow enhanced by the mid-latitude westerlies to the north, Phanfone formed a pinhole eye early on October 2.

[12] Early on October 4, the JTWC upgraded Phanfone to a super typhoon when it was located about 170 km (105 mi) east-southeast of Minamidaitōjima.

As the system started to tap into the mid-latitude westerlies, it was in an area of strong vertical wind shear offset by vigorous outflow, namely the improved poleward channel.

[16] Phanfone sharply recurved and accelerated northeastward early on the next day, tracking along the western edge of the deep-layered subtropical ridge.

[18] The eye immediately dissipated, as well as the system started to undergo extratropical transition right before making landfall near Hamamatsu of the Shizuoka Prefecture in Japan after 08:00 JST (23:00 UTC on October 5).

[22] Post-Tropical Cyclone Phanfone, which was located about 890 km (555 mi) southwest of Unalaska, Alaska, reached peak intensity of its extratropical period at noon on October 8, with a barometric pressure of 948 hPa (27.99 inHg) and hurricane-force winds.

[28] Moisture associated with Phanfone later fueled a separate cyclone over the Gulf of Alaska which brought heavy rains to parts of British Columbia, Canada.

[29] On September 29, the National Weather Service office in Guam issued a tropical storm watch for Saipan, Tinian, and the Northern Mariana Islands in anticipation of Phanfone's arrival the following day.

[31] At 10:40 a.m. local time (00:40 UTC) Northern Mariana Islands Governor Eloy Inos declared a level one Tropical Cyclone Condition of Readiness.

[36] On October 5, Phanfone also affected the Formula One 2014 Japanese Grand Prix, bringing strong winds and heavy rainfall which made the track surface wet and significantly reduced visibility.