According to the National Center for Hydro-Meteorological Forecasting, the cold air mass is still moving south.
On November 18, due to the influence of disturbances in the upper easterly wind zone combined with cold air, the area from Ha Tinh to Binh Dinh will have rain, showers and thunderstorms, locally heavy rain. During thunderstorms, there is a possibility of tornadoes, lightning and strong gusts of wind.
Localized heavy rains can cause flooding in low-lying areas; flash floods in small rivers and streams, and landslides on steep slopes.
Around the evening and night of November 18, this cold air mass will affect some places in the Northeast region of the North; then affect other places in the Northeast and North Central regions, some places in the Northwest and North Central regions. Northeast wind inland level 2 - 3, coastal areas level 3 - 4.
From the night of November 18, the Northeast and Thanh Hoa will have cold nights and early mornings.
On the night of November 18 and November 19, the Northeast region will have the lowest temperature of about 20 - 22 degrees Celsius, in mountainous areas it will be below 17 degrees Celsius. The average temperature will be about 24 - 26 degrees Celsius.
From the night of November 19, cold air will have a stronger impact, making the Northern and North Central regions cold at night and in the morning.
On the night of November 19 and the day of November 20, the North and North Central regions will have the lowest temperature of about 18 - 20 degrees Celsius, in mountainous areas 15 - 17 degrees Celsius. The average temperature is about 23 - 25 degrees Celsius, in mountainous areas some places are below 21 degrees Celsius.
According to the temperature chart from the meteorological agency, around November 21, temperatures in the northern provinces tend to drop further. The lowest temperature during this cold spell in the North and North Central regions is generally between 18 and 20 degrees Celsius, and in mountainous areas, below 15 degrees Celsius.
At sea, the Gulf of Tonkin from the night of November 18 will have strong northeast winds of level 6, gusting to level 7-8; rough seas; waves 2-3.5m high.
The western sea area of the North East Sea has strong northeast winds (including the Hoang Sa archipelago) at level 6 - 7, gusting at level 8 - 9; rough seas; waves 3 - 5m high.
Strong winds and large waves at sea are likely to affect boating and other activities.
