The centre predicted the system would move west at 20km per hour. At 1am on June 4, the tropical depression system is predicted to be at about 21.5 degrees north and 121.2 degrees east, about 340km from Luzon Island of the Philippines. The tropical storm, called Choiwan, is predicted to move to the north then turn northeast, then cease to be a tropical depression on the East Sea. There will be heavy rain in northern areas, with rainfall predicted at 80-50mm. There is a risk of flash floods and landslides in northern areas. In order to proactively respond to the storm, the Central Steer...