It initially moved to the northwest, slowly intensifying into a tropical storm while drawing moisture and rainfall over the Philippines.

Dujuan weakened to severe tropical storm status before making landfall on September 2 in southern China, just east of Hong Kong near Shenzhen, Guangdong.

[2] That day, the Japan Meteorological Agency (JMA)[nb 2] estimated that a tropical depression formed southeast of the Japanese island of Okinotorishima,[3] or about 520 km (320 mi) northwest of Guam.

The Joint Typhoon Warning Center (JTWC)[nb 3] also estimated a tropical cyclone formed on August 27.

[5] The system gradually organized while developing improved outflow to the south, although a tropical upper tropospheric trough to the north caused wind shear.

[5] That day, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) began issuing advisories as the storm approached the region, naming it Onyok.

[1] Shortly after it was named, Dujuan quickly intensified after an upper-level low to the northwest improved outflow to the north.

While near peak intensity, the center of Dujuan passed about 45 km (28 mi) south of the southern tip of Taiwan.

[5] While moving westward through the South China Sea, the typhoon weakened slightly after its peak intensity due to an eyewall replacement cycle.

[3] Although the center passed north of Luzon in the Philippines, Dujuan interacted with the monsoon to produce heavy rainfall over the country.

[11] On August 31, officials in Taiwan issued a sea warning, advising for boats to avoid the Bashi Channel.

[nb 4] Dujuan killed three people and injured eight in southern Taiwan;[6] one was a drowning in the Penghu islands, and another occurred when a man was blown out of his window in Taipei.

[16] Winds in the territory briefly reached typhoon status, or 120 km/h (75 mph), at Lau Fau Shan.

[7] During the height of the storm, three people stole $1.3 million (USD) worth of jewelry, watches, and clothing from a store.