A low-pressure system developed into a tropical depression in the East Vietnam Sea on Thursday morning and is expected to bring rain to central and south-central localities.
The tropical depression was located 180 kilometers north of Song Tu Tay Island in Vietnam's Truong Sa (Spratly) archipelago as of 7:00 am on Thursday, the National Center for Hydro-meteorological Forecasting reported.
The average wind speed was measured at 39-49km per hour.
The low-pressure system is expected to travel northwest and pick up strength in the next 24 hours.
It will continue to strengthen over the next 24-48 hours and may evolve into a storm.
By Saturday morning, the storm will be located in the maritime area off south-central Vietnam, packing winds of 62-74km per hour.
The storm will travel westward and make landfall in south-central provinces before weakening in the next 48-72 hours.
Due to the influence of the tropical depression, torrential rains of 200-500 millimeters are forecast to batter the localities from north-central Quang Binh Province to south-central Khanh Hoa Province, as well as provinces in the Central Highlands from Thursday to Sunday.
Heavy rainstorms will occur in the central part of the East Vietnam Sea during this period.