This afternoon, September 9, the National Center for Hydro-Meteorological Forecasting said that the cold air mass is still moving southward. In the North, there are showers and thunderstorms in some places; the temperature at 1 pm is commonly 31-34 degrees C.
Near dawn and morning of September 10, this cold air mass will affect the northeastern mountainous area of the Northern region, then affect other places in the Northeast region, North Central region and some places in the Northwest region. On land, the wind will shift to Northeast level 2-3, coastal area level 3.
The Northeast and North Central regions will turn cool from September 10th.
From September 10th to September 11th, the Northeast and North Central regions will have the lowest temperature of about 21 - 24 degrees Celsius, with some places in the Northern mountainous region below 19 degrees Celsius. The average temperature is about 24 - 26 degrees Celsius, with some places in the mountainous region below 23 degrees Celsius.
Hanoi area has rain, showers and scattered thunderstorms, locally heavy rain; from September 10, the weather will turn cool.
Regarding the development of rain due to cold air, from the evening and night of September 9 to the night of September 10, the Northern region will have scattered showers and thunderstorms, with locally heavy rain.
From September 10th to September 11th, Thanh Hoa to Hue city will have moderate rain, heavy rain and scattered thunderstorms, with locally very heavy rain.
In thunderstorms, there is a high possibility of tornadoes, lightning, hail and strong gusts of wind.
Rainstorms accompanied by tornadoes, lightning, hail and strong gusts of wind affect agricultural production, causing trees to fall, damaged houses, traffic works, and infrastructure.
Heavy rain and localized heavy rain are likely to cause flash floods on small rivers and streams, landslides on slopes and flooding in low-lying areas.
At sea, from September 10, in the Gulf of Tonkin, the wind will shift to Northeast direction, strong at level 4 - 5.
From the night of September 10, in the Gulf of Tonkin and the northern sea area of the Northern East Sea, there will be strong northeast winds at level 6, gusts at level 7 - 8; sea waves are 2 - 3m high, rough seas.
Strong winds and gusts, large waves at sea are likely to affect the operation of ships and other activities.
