According to the National Center for Hydro-Meteorological Forecasting, on the afternoon of December 21, after entering the sea southwest of Truong Sa, the tropical depression weakened into a low pressure area.
At 1 p.m. on December 21, the center of the low pressure area was at about 7.5 degrees North latitude; 111.5 degrees East longitude, in the area southwest of Truong Sa. The strongest wind in the center of the low pressure area decreased to below level 6 (below 39 km/h).
It is forecasted that from 1:00 p.m. on December 21 to 1:00 p.m. on December 22, the low pressure area will continue to move southwest, weaken and gradually dissipate.
It is forecasted that in the afternoon and night of December 21, the area from Ha Tinh to Khanh Hoa will continue to have rain, moderate rain, locally heavy rain with rainfall of 15-30mm, some places over 50mm.
On the day and night of December 22, the area from Quang Tri to Khanh Hoa continued to have rain, moderate rain, and heavy rain in some places.
From December 23 to 24, in the area from Da Nang to Binh Thuan, there is a possibility of moderate rain, heavy rain, and in some places very heavy rain and thunderstorms.
Localized heavy rains are likely to cause flash floods on small rivers and streams, landslides on steep slopes and waterlogging in low-lying areas.
Meanwhile, due to the influence of the strengthening cold air, the Gulf of Tonkin has strong northeast winds of level 6, sometimes level 7, gusting to level 8; the Central Coast has strong winds of level 6, gusting to level 9.
In the North, Thanh Hoa and Nghe An, the weather continues to be very cold, especially in mountainous areas. In the area from Ha Tinh to Thua Thien - Hue, the weather is very cold. The lowest temperature at night and early morning in the North, Thanh Hoa and Nghe An is generally from 8-11 degrees Celsius, in the mountainous areas of the North, it is generally 4-7 degrees Celsius, in the high mountainous areas, it is below 3 degrees Celsius in some places; in the area from Ha Tinh to Thua Thien - Hue, it is generally from 13-16 degrees Celsius.
At sea, in the Gulf of Tonkin, the northeast wind is strong at level 6, sometimes at level 7, gusting to level 8-9, with waves 2-4m high and rough seas. In the North East Sea (including the Hoang Sa sea area), there is a strong northeast wind at level 7, gusting to level 9, with waves 4-6m high and rough seas.
The sea area from Quang Tri to Ca Mau, the area between the East Sea and the western sea area of the South East Sea (including the sea area west of Truong Sa) has strong northeast winds of level 6-7, gusts of level 8-9, waves 4-6m high, rough seas.
This widespread cold spell in the North, Thanh Hoa - Nghe An provinces, is likely to last until around December 25. The midlands and mountainous areas in the North are likely to experience frost and frost.
The area from Ha Tinh to Khanh Hoa will have rain, moderate rain, locally heavy rain to very heavy rain. Particularly, the area from Da Nang to Binh Thuan from December 23 to 24 is likely to have moderate rain, heavy rain, some places very heavy rain and thunderstorms.
Localized heavy rains may cause flash floods in small rivers and streams, and landslides on steep slopes. Strong winds and large waves at sea may affect shipping and other activities. Low temperatures may affect crops and livestock.
Weather forecast for the night of December 21 to December 22 in the Northwest region: light rain in some places, sunny in the afternoon; light wind; cold and severe cold. There is a possibility of frost and frost in the highlands. The lowest temperature is from 9-12 degrees Celsius, some places below 7 degrees Celsius. The highest temperature is from 16-19 degrees Celsius; in the Northwest region, some places are 22-24 degrees Celsius.
Northeast and Hanoi capital, no rain at night, sunny during the day. Northeast wind level 3, coastal areas level 4, gusting level 6-7. Cold weather, mountainous areas extremely cold. Midland and mountainous areas in the North are likely to have frost and frost. Lowest temperature from 9-12 degrees Celsius, mountainous areas from 4-7 degrees Celsius, high mountainous areas in some places below 4 degrees Celsius. Highest temperature from 15-18 degrees Celsius, some places above 18 degrees Celsius.
Provinces from Thanh Hoa to Thua Thien - Hue, the North (Thanh Hoa, Nghe An) are cloudy, no rain at night, sunny during the day; the South is cloudy, with rain, moderate rain, locally heavy rain and thunderstorms; North to Northwest wind level 3, coastal areas level 4-5; cold weather, especially in the North it is very cold. The lowest temperature in the North is from 10-13 degrees Celsius, in the South is from 13-16 degrees Celsius. The highest temperature is from 16-19 degrees Celsius, in the South some places are over 19 degrees Celsius.
Provinces and cities from Da Nang to Binh Thuan will have rain, moderate rain, locally heavy rain and thunderstorms; Ninh Thuan - Binh Thuan will have showers and thunderstorms in some places; Northeast wind level 3; in thunderstorms there is a possibility of tornadoes, lightning and strong gusts. The lowest temperature is from 18-21 degrees Celsius, in the South from 21-24 degrees Celsius. The highest temperature is from 23-26 degrees Celsius in the North, from 27-30 degrees Celsius in the South, some places above 30 degrees Celsius.
In the Central Highlands, there will be scattered showers and thunderstorms at night, and sunny days; Northeast to East winds at level 3; thunderstorms are likely to cause tornadoes, lightning, and strong gusts of wind. The lowest temperature will be 17-20 degrees Celsius; the highest will be 24-27 degrees Celsius, with some places reaching over 27 degrees Celsius.
In the South, there will be scattered showers and thunderstorms at night, sunny during the day; Northeast to East winds at level 3; in thunderstorms, there is a possibility of tornadoes, lightning and strong gusts of wind. The lowest temperature is from 22-25 degrees Celsius; the highest is from 30-33 degrees Celsius, some places are over 33 degrees Celsius.
According to VNA