Forecasters noted that at 10am on October 28, the tropical low-pressure zone was located at 11.0 degrees north latitude and 119.5 degrees east longitude, approximately 500km east-northeast of the Truong Sa archipelago, also known as the Spratly islands.
During the next 24 hours, the tropical low-pressure system is expected to move west-northwest at a speed of between 15km and 20km per hour and is likely to strengthen into a tropical depression.
Over the course of the next 48 hours, the tropical depression will then quickly move west-northwest at a speed of between 20km and 25km per hour and is forecast to develop into a typhoon.
By 10am on October 30, the centre of the typhoon will be positioned at 12.5 degrees north latitude and 111.0 degrees east longitude, approximately 190km east of the coastal provinces of Phu Yen and Khanh Hoa. Close to the eye of the storm where gales are at their strongest, the average wind speed will be at an estimated 60km to 75km per hour.
In the next 72 hours, the typhoon is then anticipated to move west at speeds of between 15km to 20km per hour.