Currently (January 18th), the cold air mass is continuing to move southward. The Northern region is experiencing scattered rain, with temperatures generally ranging from 18–21°C.
Forecast of cold air mass developments over the next 24–48 hours
Around the evening and night of January 20th, a cold front began to affect some areas in the Northeast of Northern Vietnam. On January 21st, the cold front intensified and expanded its influence to the Northeast, North Central, Northwest, and Central regions of Vietnam. From the evening and night of January 20th, winds on land shifted to the Northeast at level 2-3, and level 3-4 in coastal areas.
From the evening and night of January 20th, a strong cold front began to affect Northern Vietnam and extended to North Central Vietnam, causing scattered rain and a drop in temperature.
From the evening and night of January 20th to January 22nd, scattered rain is expected in Northern Vietnam, Thanh Hoa, and Nghe An . From January 21st, the weather in Northern Vietnam and North Central Vietnam will turn cold, with the possibility of severe cold in mountainous and hilly areas of Northern Vietnam around January 22nd-23rd, and even frost in some places. The lowest temperatures during this cold spell in Northern Vietnam, Thanh Hoa, and Nghe An will generally be 11-14°C; in mountainous areas of Northern Vietnam, 8-11°C, and in high mountainous areas, temperatures may drop below 6°C.
Hanoi area
From the evening of January 20th to January 22nd, there will be scattered rain. From January 21st onwards, the weather will turn cold, with the lowest temperatures generally ranging from 12–14°C.
Weather at sea
From late afternoon and night of January 20th, in the northern South China Sea (including the Hoang Sa Special Administrative Region), the northeast wind will gradually strengthen to level 6, sometimes reaching level 7 in the east, with gusts of level 8-9, causing rough seas and waves 3-5 meters high.
From January 21st, the northeast wind in the Gulf of Tonkin will gradually strengthen to level 6, gusting to levels 7-8, causing rough seas with waves 2-3 meters high.
From the evening of January 21st, the sea area from southern Quang Tri to Khanh Hoa and the central part of the East Sea will experience increasingly strong northeasterly winds reaching level 6, gusting to levels 7-8, with rough seas and waves 2-5 meters high.
From January 22nd, the sea area from Lam Dong to Ca Mau and the western sea area of the South China Sea (including the western part of the Truong Sa special zone) will experience increasingly strong northeasterly winds, reaching level 6, sometimes level 7, with gusts of level 8-9, causing rough seas and waves 3-5 meters high.
Warning of potential accompanying natural disasters.
From January 21st, the area from Ha Tinh to Da Nang City and the eastern parts of the provinces from Quang Ngai to Gia Lai will experience rain, showers, with some areas experiencing moderate to heavy rain and thunderstorms. During thunderstorms, there is a possibility of tornadoes, lightning, hail, and strong gusts of wind. Mountainous areas of the Northern provinces should be wary of frost and ice.
Potential impact on the environment, living conditions, and socio-economic activities.
Severe cold, frost, ice, and hoarfrost can affect livestock, poultry, and the growth and development of crops.
Localized heavy rainfall poses a risk of flooding in low-lying areas, flash floods in small rivers and streams, landslides on slopes, and urban and industrial zone inundation.
Strong winds, gusts, and large waves at sea can affect the operation of ships and other activities.
Source: https://baolaocai.vn/khong-khi-lanh-manh-tran-ve-vung-nui-bac-bo-co-noi-duoi-6-do-c-post891643.html
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