Cold front brings rain and 14°C lows to northern Vietnam
A cold front moving south brings heavy rain, thunderstorms, and hazardous maritime conditions to northern Vietnam, with minimum temperatures in mountainous regions expected to range between 14 and 17 degrees Celsius, vietnam.vn reported.
Cold Air Mass Reaches Northern Vietnam and Thanh Hoa
The National Center for Hydro-Meteorological Forecasting tracked the advancing cold front as it pushed southward. Temperatures at 1:00 AM ranged between 26 and 29 degrees Celsius before the front arrived. By late afternoon and evening, the cold air mass crossed into the northeastern region, bringing declining temperatures to northern provinces and the area stretching from Thanh Hoa down to the city of Hue. Inland winds shifted to the northeast at force 2 to 3, while coastal areas experienced stronger winds reaching force 3 to 4. In the northeastern region and Thanh Hoa province, the climate turned cold, with sub-zero readings recorded in select high-altitude mountain locations. Minimum temperatures during this cold wave generally settled between 19 and 22 degrees Celsius in the northern plains and Thanh Hoa, while mountainous elevations dropped sharply to between 14 and 17 degrees Celsius.
Heavy Rains and Severe Thunderstorm Risks
Showers and thunderstorms developed across the northern and northwestern mountainous zones, dumping locally intense to very intense precipitation. From the early morning hours through the next morning, the broader northern region absorbed moderate to heavy rainfall. This wet weather pattern expanded southward between the night of October 4 and October 6, affecting the territory from Thanh Hoa to Hue with continued downpours. The meteorological agency warned that these thunderstorms carried a high probability of secondary hazards, including tornadoes, lightning, hail, and violent gusts of wind. In Hanoi, the cold front triggered moderate rain and localized heavy downpours overnight, transitioning into cold conditions by morning.
Agricultural and Infrastructure Disruptions
Sudden squalls, lightning, and hail damage agricultural production, uproot trees, and compromise residential houses and transport infrastructure. Torrential rainfall creates immediate flood risks along small rivers and mountain streams, alongside dangerous soil saturation that triggers landslides on steep slopes and widespread inundation across low-lying terrain.
Maritime Hazards in the Gulf of Tonkin and South China Sea
Marine operations face severe disruptions as strong winds sweep across coastal waters and open seas. Starting from the morning, winds in the Gulf of Tonkin shifted to the northeast and escalated to force 6, occasionally reaching force 7, with violent gusts hitting force 8 to 9. These conditions generated turbulent seas and waves standing 2 to 3 meters high. The northern part of the Northeast Sea experienced similar gale-force winds from the northeast, forcing wave heights up to 2 to 4 meters. By October 6, the zone of hazardous winds expanded further across the northern portion of the South China Sea, including the Paracel Islands, restricting navigation and maritime transport.