At 6:30 am on July 16, the Joint Typhoon Warning Center upgraded the rating to "High" and issued a tropical cyclone warning. The Joint Typhoon Warning Center raised the system to a tropical depression at 2:40 pm, giving the number 06W. At 3 pm on the same day, the Japan Meteorological Agency upgraded it to a tropical storm, giving the international number 1905 and named it "Danas", followed by the China National Meteorological Center, the Central Meteorological Bureau of Taiwan, and PAGASA also upgraded it to a tropical storm. The Joint Typhoon Warning Center was upgraded to a tropical storm late that night.