According to the National Center for Hydro-Meteorological Forecasting, currently, a cold air mass is moving south from the north.
Around December 6, this cold air mass will have a weak impact on the northeastern provinces, causing the weather in this area to turn cooler. The northern region will have scattered showers and rain.
Hanoi area has scattered rain, the weather turns cool.
Around December 7, the cold air will strengthen, affecting the Northwest, North Central, Central Central and some places in the South Central. The northeast wind inland will be strong at level 3-4, coastal areas at level 4-5.
The weather in the North will turn cold. The weather in the North Central region will turn cold from the night of December 7. The lowest temperature in this cold air mass in the North and North Central regions will generally be from 15 - 18 degrees Celsius, in mountainous areas 12 - 14 degrees Celsius, and in high mountainous areas, some places will be below 10 degrees Celsius.
The weather in Hanoi is turning cold. The lowest temperature in this cold air mass is commonly 15 - 18 degrees Celsius.
The North Central and South Central regions have rain, showers, locally heavy rain and thunderstorms.
Thunderstorms may cause 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.
At sea, on December 6, Gulf of Tonkin wind changes to northeast level 4 - 5; from December 7 wind gradually increases to level 6, gusting to level 7 - 8; rough sea; waves 1.5 - 3m high.
From the afternoon of December 7, the sea area from Quang Tri to Quang Ngai has strong northeast winds of level 6, gusting to level 7-8, rough seas; waves 2-4m high.
On December 6, the eastern sea area of the North East Sea has strong northeast winds of level 6, gusting to level 7 - 8; rough seas; waves 2 - 4m high. From December 7, the northern East Sea area (including Hoang Sa archipelago) has strong northeast winds of level 6, especially the northeastern sea area sometimes has level 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.
