Northern Vietnam could be affected by a strong cold-air spell around 8–9 November, according to the National Center for Hydro-Meteorological Forecasting in a government news report published on 5 November. The centre’s assessment covered potential hazards through 14 November.
The two forecast phases
The centre expected a weaker cold-air spell from the night of 5 November into 6 November, bringing scattered showers and thunderstorms in northern areas, particularly the mountains and midlands. It warned that thunderstorms could bring tornadoes, lightning and strong gusts.
The stronger spell was projected around 8–9 November, with rain and thunderstorms. Minimum temperatures in the north and north-central region were forecast at 16–19°C, potentially below 13°C in northern mountains. Those are projected ranges, not measured lows.
From the night of 8 November through 12 November, the centre expected winds to strengthen to force 6, locally force 7, with gusts of force 8–9 in the Gulf of Tonkin and waters from southern Quảng Trị to Quảng Ngãi. It also identified a possibility of widespread heavy rain from 9–12 November in areas from Thanh Hóa through Huế and Đà Nẵng, and eastern areas from Quảng Ngãi to Đắk Lắk.
Historical context and validity
The centre reported that October 2026 temperatures in northern Vietnam averaged 2–3°C above the long-term average for the same month. The national October average was 26.3°C, or 1.74°C above that comparison. Those figures describe October observations, not November temperatures.
The hazard outlook in the 5 November article runs through 14 November. Forecasts can change, so later official updates should be checked as each forecast period approaches.