According to the National Center for Hydro-Meteorological Forecasting, the north has a cold air mass compressing and pushing a low pressure trough with its axis at about 26 - 29 degrees north latitude moving southward. In the North, there are showers and thunderstorms in some places, the common temperature is 26 - 29 degrees C.
Around the night of May 7, this cold air mass will affect the Northeast region, then affect the North Central region and some places in the Northwest region. On land, the wind will turn northeast at level 2-3, coastal areas at level 3-4.
The Northeast region and Thanh Hoa from the night of May 7th will turn cool. The lowest temperature this time in the Northeast region and Thanh Hoa is commonly from 21-24 degrees C, the Northern mountainous region has places below 21 degrees C.
Hanoi area from the evening of May 7 to May 8 has rain, moderate rain and scattered thunderstorms, locally heavy to very heavy rain; from May 8, the weather turns cool. The lowest temperature is commonly 22 - 24 degrees C.
Regarding the development of rain due to cold air, from the afternoon of May 7 to May 8, the Northern region, Thanh Hoa and Nghe An will have rain, moderate rain and scattered thunderstorms with rainfall of 20 - 40mm, locally heavy to very heavy rain over 100mm.
From the evening of May 7 to May 8, the area from Ha Tinh to Hue city will have scattered showers and thunderstorms with rainfall of 10 - 30mm, locally heavy rain over 70mm.
The meteorological agency warns that during 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, houses, traffic works, and infrastructure to be damaged. Localized heavy rains are likely to cause flash floods on small rivers and streams, landslides on slopes, and flooding in low-lying areas.
At sea, from near dawn on May 8, in the north of the Gulf of Tonkin, the wind will turn northeast at level 4 - 5, gusting at level 6, sea waves 1 - 2m high, rough seas.
From the evening and night of May 8, the northeastern sea area of the Northern East Sea will have strong northeast winds of level 6, gusts of level 7 - 8, sea waves 2 - 3m high, rough seas. Strong winds and gusts, large waves at sea are likely to affect the operation of ships and other activities.
