On July 11, a low-pressure zone was formed near the Mariana Islands, and the US Naval Research Laboratory gave it a tropical disturbance number of 98W. At 8 o'clock on the morning of July 14, the Japan Meteorological Agency upgraded it to a tropical depression. At this point the system moves to the approximate west. At 8 pm, the Joint Typhoon Warning Center gave its development rating "low". At 8 o'clock on the morning of July 15, the Japan Meteorological Agency issued a gale warning, and the Central Meteorological Bureau of Taiwan upgraded it to a tropical depression, given the number TD10 . At 3 pm, the Joint Typhoon Warning Center upgraded the rating to "Medium". At 10 pm, the Hong Kong Observatory upgraded it to a tropical depression.