The National Center for Hydro-Meteorological Forecasting has forecast cold air developments in the next 24 to 48 hours.
Around the evening and night of November 25, this cold air mass will affect the northeastern provinces, then affect the North Central, Northwest and Central Central regions. Northeast winds inland will be strong at level 3-4, coastal areas at level 4-5.
Due to the influence of cold air, from the evening and night of November 25 to the morning of November 26, in the Northeast region and Hanoi, there will be scattered rain.
On November 26, the North and Central Central regions will have rain, moderate rain, locally heavy rain to very heavy rain and thunderstorms from early morning. 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.
The weather in the North and North Central regions turns cold, and the mountainous areas are freezing.
From the night of November 26, the weather in the North and North Central regions will turn cold. The lowest temperature in this cold air mass in the North and North Central regions is generally from 16 - 18 degrees Celsius, in mountainous areas 12 - 14 degrees Celsius, and in high mountainous areas below 10 degrees Celsius.
Hanoi is turning cold with the lowest temperature in this cold air mass commonly being 17 - 19 degrees Celsius.
At sea, from the evening and night of November 25, the Gulf of Tonkin will have strong northeast winds of level 6 - 7, gusting to level 8 - 9, rough seas; waves 2 - 3.5m high.
From November 26, the North East Sea area (including the Hoang Sa archipelago) will have strong northeast winds of level 6 - 7, gusts of level 8 - 9, rough seas, waves 3 - 5m high; the area from Quang Tri to Quang Ngai will have strong northeast winds of level 6, gusts of level 7 - 8, rough seas, waves 2 - 4m high.
Strong winds and large waves at sea are likely to affect boating and other activities.
