According to the National Center for Hydro-Meteorological Forecasting, cold air has currently affected some places in the northern mountainous region. The Northern region will have rain and showers; the common temperature is 20 - 22 degrees Celsius, especially in mountainous areas 16 - 19 degrees Celsius.
On December 13, cold air continues to affect other places in the Northeast region, then expands to the North Central region, the Northwest and Central Central regions. On land, strong northeast winds of level 3 - 4, coastal areas of level 4 - 5, some places of level 6, gusting to level 7 - 8.
In the Northern region, the weather is cold, some places are very cold; mountainous and midland areas are very cold, high mountainous areas have some places are very cold.
The North Central region will turn cold from the night of December 13.
During the day and night of December 13, the lowest temperature in the Northern region will be generally 13 - 16 degrees Celsius; in mountainous and midland areas, it will be generally 9 - 12 degrees Celsius, with some places below 5 degrees Celsius. The average temperature is generally 16 - 18 degrees Celsius, in mountainous and midland areas, it will be 14 - 16 degrees Celsius, in high mountainous areas, some places below 13 degrees Celsius.
The North Central region has the lowest temperature of 14 - 17 degrees Celsius, the average temperature is 17 - 19 degrees Celsius.
During the day and night of December 14, the lowest temperature in the Northern region will generally be 11-14 degrees Celsius; in mountainous and midland areas 7 - 10 degrees Celsius, some places below 5 degrees Celsius. The average temperature is generally 15 - 17 degrees Celsius, in mountainous and midland areas 13 - 15 degrees Celsius, in high mountainous areas below 12 degrees Celsius.
The North Central region has the lowest temperature of 12 - 15 degrees Celsius, the average temperature is 16 - 18 degrees Celsius.
The lowest temperature in this cold air mass in the mountainous and midland areas of the North will generally be 7 - 10 degrees Celsius, in high mountainous areas, some places will be below 5 degrees Celsius; in the Northern Delta, it will generally be 11 - 14 degrees Celsius; in the North Central region, it will generally be 12 - 15 degrees Celsius.
The weather is very cold, with severe cold in some places, which can affect livestock and poultry, while also affecting the growth and development of crops.
Hanoi area on December 13 will have rain, moderate rain and thunderstorms; thunderstorms are likely to cause tornadoes, lightning, hail and strong gusts of wind. Cold weather, some places are very cold. The lowest temperature in this cold air mass is generally 12 - 14 degrees Celsius.
Due to the influence of cold air combined with convergence in the upper westerly wind zone, the plains and coastal areas of the North and from Thanh Hoa to Hue city will have moderate rain, heavy rain, locally very heavy rain and thunderstorms.
Da Nang city and the eastern part of Quang Ngai province will have rain, moderate rain, locally heavy rain and thunderstorms. During thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind.
Heavy rain is likely to cause flooding in low-lying areas; flash floods on small rivers and streams; landslides on steep slopes. High-intensity rain in a short period of time can cause flooding in urban areas and industrial parks.
