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.