An area of disturbed weather developed northwest of Guam on September 10 and moved northwestward, slowly increasing in organisation.
The Japan Meteorological Agency began monitoring the system as a tropical depression the next day.
The depression continued to intensify, and the JMA upgraded it to Tropical Storm Nari later that morning.
The storm then underwent rapid intensification that afternoon and evening, strengthening from a tropical depression to a typhoon in just 18 hours.
[3] United States Marine bases located in Okinawa were placed under Tropical Cyclone Condition of Readiness-3 as Nari approached the islands on September 15.
They were to ride out the storm at the Foster headquarters building until Tropical Cyclone Condition of Readiness-1 had been sounded.
[7] Several ports along the southern coast of South Korea were shut down due to the storm.
[10] This record was eclipsed less than two weeks later by Typhoon Wipha which produced a wind gust of 252 km/h (157 mph).
[15] Following Typhoon Nari, Jeju Island was declared a national disaster area by the South Korean government.