According to the National Center for Hydro-Meteorological Forecasting, from around the night of December 26 and December 27, the cold air mass will strengthen and affect the Northeast and North Central regions.
From the night of December 27, the cold air will be strengthened and affect the Northwest and Central Central regions. The northeast wind inland will strengthen to level 2-3, and coastal areas to level 3-4.
The North and the area from Thanh Hoa to Thua Thien Hue continue to be cold, with some mountainous areas in the North experiencing severe cold. The lowest temperature during this cold spell in the North and North Central regions is generally between 12 and 15 degrees Celsius, with some mountainous areas below 10 degrees Celsius. The area from Quang Binh to Thua Thien Hue is generally between 15 and 18 degrees Celsius.
Hanoi area is cold. The lowest temperature in this cold air mass is commonly 12 - 15 degrees Celsius.
The Central and South Central regions will have rain, moderate rain, locally heavy rain and thunderstorms. Thunderstorms may include 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, from December 27, the Gulf of Tonkin will have strong northeast winds of level 6, gusting to level 7-8; rough seas; waves 2-3m high. In the North East Sea (including the Hoang Sa archipelago), strong northeast winds of level 7, gusting to level 9; rough seas; waves 4-6m high.
The sea area from Quang Tri to Ca Mau, the central East Sea area, the sea area west of the South East Sea area (including the sea area west of Truong Sa archipelago) has strong northeast wind level 6, sometimes level 7, gusting to level 8 - 9; rough seas; waves from 3 - 5m high.
Strong winds and large waves at sea are likely to affect boating and other activities.
