The cold front will strengthen from October 20 to 22, expanding its influence across the entire northern region and north-central provinces before reaching parts of the northwest and central regions.

On October 18 night and 19, scattered showers and thunderstorms are expected in the northeastern region and Hanoi, with northeasterly winds strengthening along coastal areas.

From the night of October 20, northern Vietnam will experience the first cool spell of the season. Temperatures will drop to 19-21°C in lowland areas and below 17°C in the mountains, with cold conditions at night and early morning, and chilly weather in highland areas.

At sea, from October 19, the Gulf of Tonkin and the northern part of the East Sea (South China Sea) will have strong northeasterly winds of level 6, gusting to level 7-8 (39-74 km/h), with waves 2-4 meters high and rough seas.

The cold air combined with thunderstorms may bring whirlwinds, lightning, hail, and strong gusts, potentially disrupting farming, transportation, and daily activities. Mountainous areas are warned of flash floods and landslides, while low-lying areas may face localized flooding.

Cold air mass brings heavy rain to large parts of Vietnam

VOV.VN - A cold air mass is moving southward, bringing heavy rain to large parts of Vietnam, from the northern to central regions of the country, according to the National Centre for Hydro-meteorological Forecasting.

Cold air mass hits northern border, brings rain and cold temperatures

VOV.VN - A cold air mass has moved closer to Vietnam’s northern border and will begin affecting the northern region on February 2 evening, bringing rain and cold temperatures, according to the National Centre for Hydro-meteorological Forecasting.