The ninth named storm of the 2008 Pacific typhoon season, Kammuri developed as a tropical depression on August 4 north of Luzon.

The next day, the depression intensified into a tropical storm, resulting in the Japan Meteorological Agency naming it Kammuri.

The following day, Kammuri reached its peak intensity with sustained winds of 50 kn (93 km/h) before making landfall in Guangdong province, China.

[10] The Hong Kong Observatory (HKO) then upgraded Kammuri to a severe tropical storm late on August 5, with the JMA doing the same early the next morning.

[11][12] However, Kammuri started to weaken after making landfall along the south coast of China in the Western Guangdong Province at about 12pm UTC on August 6.

After making landfall for the second time on August 7 Kammuri weakened to a tropical depression as the JMA issued its final advisory.

[18] As Tropical Depression Julian formed to the north of the Philippines On August 3, PAGASA issued Storm Signal #1, a warning for winds of 30–60 km/h (19–37 mph), for parts of Luzon.

[10] However, no damage was reported in the Philippines[22] Kammuri affected athletes training for the Olympics which were about to be held within China and Hong Kong.