After developing a small eye, the typhoon attained peak winds of 150 km/h (93 mph) as it passed between Taiwan and Okinawa.

The system tracked generally westward in an area of moderate wind shear, maintaining a weak circulation center.

[2] Shortly before that time, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) initiated advisories on the system, giving it the name Karen.

[3] Further convective organization occurred as the circulation consolidated, and the Joint Typhoon Warning Center (JTWC) issued a Tropical Cyclone Formation Alert late on August 6.

The next day, the agency initiated advisories on Tropical Depression 16W about 780 km (480 mi) east of the Philippines island of Luzon.

Subsequently, the depression maintained a northward track, due to its location along the northwest periphery of a near-equatorial ridge, as well as the presence of a tropical upper tropospheric trough.

[3] A small eye became evident on satellite imagery, and late on August 11 the JMA estimated the typhoon attained peak winds of 150 km/h (93 mph).

The JTWC, however, assessed Rananim as intensifying slightly more despite decreased outflow, reaching peak winds of 165 km/h (103 mph).

[1] After passing north of Taiwan, Rananim made landfall at peak intensity around 1300 UTC on August 12, near Wenling in Zhejiang province in China.

Early on August 13, the JMA downgraded Rananim to a tropical depression and issued the last warning; by that time, the circulation was over Jiangxi.

[2] After receiving heavy damage from Typhoon Mindulle a month earlier, residents in Taiwan prepared for Rananim by erecting sandbags along flood prone areas, while the Central Weather Bureau advised mariners to be on alert due to the storm.

[5] Around the same time as affecting Taiwan, Rananim passed southwest of Okinawa, producing wind gusts up to 176 km/h (109 mph), as well as heavy rainfall totaling 229 mm (9.0 in) on Miyako-jima.

Rananim also produced strong winds as it moved through the region, with a record-breaking gust of 211 km/h (131 mph) reported in the offshore Dachen Islands.

[16] In Shanghai, about 145 km (90 mi) north of the landfall location, Rananim left little damage, although its rainfall alleviated a heat wave.

As a result, the government rebuilt homes across the affected area to higher building standards in order to mitigate future losses from typhoons.