 Forming as a tropical disturbance near the International Dateline on October 29, the system moved westward at low latitude eventually organizing into a tropical depression on November 3 south of Guam. The system moved north of due west across the central Philippines and emerged into the South China sea before strengthening into a tropical storm on November 9. Herbert moved westward, making landfall in Vietnam on November 11 before dissipating in Laos on November 12.
