According to the National Center for Hydro-Meteorological Forecasting, currently, cold air has affected the northern part of the South Central region; the Gulf of Tonkin has strong northeast winds of level 6, sometimes level 7, gusting to level 8 - 9; the Central coastal area has strong winds of level 6, gusting to level 8.
During the day and night of December 15, cold air continues to affect other places in the South Central region. Northeast winds inland are strong at level 2-3, coastal areas at level 4-5.
The North, Thanh Hoa and Nghe An are very cold, the mountainous areas of the North are very cold, very cold. The lowest temperature in this cold air mass is generally from 10 - 13 degrees Celsius, in mountainous areas 7 - 10 degrees Celsius, in high mountainous areas some places are below 6 degrees Celsius. The average temperature is about 13 - 15 degrees Celsius, in mountainous areas some places are below 12 degrees Celsius.
The area from Ha Tinh to Thua Thien Hue is cold. The lowest temperature in this cold air mass is generally from 13 - 16 degrees Celsius. The average temperature is about 16 - 18 degrees Celsius.
The meteorological agency warns that prolonged cold weather can affect crops and livestock.
Hanoi area is very cold. The lowest temperature in this cold air mass is commonly 10 - 13 degrees Celsius.
Due to the influence of cold air combined with disturbances in the upper easterly wind zone, on the day and night of December 15, in the area from Quang Nam to Binh Thuan, there will be moderate rain, heavy rain and thunderstorms, locally very heavy rain. During thunderstorms, there is a possibility of tornadoes, lightning and strong gusts of wind.
Heavy rains can cause flooding in low-lying areas; flash floods in small rivers and streams, and landslides on steep slopes.
During the day and night of December 16, the North and Thanh Hoa have the lowest temperature of 10 - 13 degrees Celsius; mountainous areas 6 - 9 degrees Celsius, some places below 5 degrees Celsius. The average temperature is about 15 - 17 degrees Celsius; mountainous areas have places below 13 degrees Celsius.
From Nghe An to Thua Thien Hue, the lowest temperature is about 14 - 17 degrees Celsius; the average temperature is about 17 - 19 degrees Celsius.
At sea, on December 15, the Gulf of Tonkin has strong northeast winds of level 6, gusting to level 7-8; rough seas; waves 2-4m high. From the night of December 15, the wind will gradually decrease.
The North East Sea area (including Hoang Sa archipelago) has strong northeast winds of level 6 - 7, gusts of level 8 - 9, rough seas; waves 4 - 6m high.
The sea area from Quang Tri to Ca Mau and the central East Sea has strong northeast winds of level 6, sometimes level 7, gusting to level 8 - 9; rough seas; waves 3 - 5m high.
From the evening and night of December 15, the sea area west of the South China Sea (including the west of Truong Sa archipelago) will have strong northeast winds of level 6, gusting to level 7-8; rough seas; waves 3-5m high.
Strong winds and large waves at sea are likely to affect boating and other activities.
