This afternoon, December 9, the National Center for Hydro-Meteorological Forecasting provided information on cold air developments in the next 24 to 48 hours.
From the night of December 10, due to the influence of cold air combined with high-altitude easterly wind disturbances, the Central Central and South Central regions will experience moderate rain, heavy rain and thunderstorms, with some places experiencing very heavy rain. Thunderstorms may include tornadoes, lightning and strong gusts of wind.
Heavy rain can cause flooding in low-lying areas; flash floods in small rivers and streams, and landslides on steep slopes.
Around the afternoon and night of December 11, this cold air mass will affect the northeastern provinces, then affect the North Central region and some places in the northwest.
The weather in the North is getting colder, with some mountainous areas experiencing severe cold. The lowest temperature during this cold spell in the North is generally between 14 and 17 degrees Celsius, in mountainous areas 11 and 14 degrees Celsius, and in high mountainous areas below 10 degrees Celsius.
The weather in Hanoi is turning cold. The lowest temperature in this cold air mass is commonly 15 - 17 degrees Celsius.
From the night of December 12, cold air continues to strengthen and affect the Northwest, Central Central and some places in the South Central. The wind changes to the northeast, strong level 3 inland, level 3-4 in coastal areas.
The North Central region is turning cold. The lowest temperature is commonly from 14 - 17 degrees Celsius, in mountainous areas 11 - 14 degrees Celsius, in high mountainous areas some places are below 10 degrees Celsius.
At sea, from the evening and night of December 11, the wind in the Gulf of Tonkin will change to strong northeast level 6, gusting to level 7-8; from the night of December 12, the wind will gradually increase to level 6-7, gusting to level 8-9; the sea will be rough; waves will be 2-3m high.
From the evening and night of December 11, in the North East Sea area (including Hoang Sa archipelago), the northeast wind will gradually increase to level 6 - 7, gusting to level 8 - 9; rough seas; waves 3 - 5m high.
Strong winds and large waves at sea are likely to affect boating and other activities.
