This afternoon (September 10), weak cold air has affected most of the Northeast region. In the North, there are showers and scattered thunderstorms, locally heavy rain; the temperature at 13:00 is commonly 27-30 degrees Celsius.
In the late afternoon and night of September 10, cold air will continue to affect other places in the Northeast, some places in the North Central and Northwest. On land, there is Northeast wind level 2-3, coastal areas level 3.
The Northeast and North Central regions have the lowest temperatures in this cold air wave, commonly from 21-24 degrees C, the high mountainous areas of the North have places below 19 degrees C. The average temperature is about 25-27 degrees C, the mountainous areas have places below 24 degrees C.
Hanoi area from the evening of September 10th to the morning of September 11th will have rain, showers and scattered thunderstorms, with locally heavy rain.
Regarding the development of rain due to cold air, from the evening of September 10th to the morning of September 11th, the Northern region, Thanh Hoa and northern Nghe An province will have scattered showers and thunderstorms, with locally heavy rain. After that, from the afternoon of September 11th, the Northern region will only have showers and thunderstorms in a few places.
From the evening of September 10th to the night of September 11th, the area from the south of Nghe An province to Da Nang city and the east of Quang Ngai province will have moderate rain, heavy rain and scattered thunderstorms, 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, houses, traffic works, and infrastructure to be damaged. 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, in the Gulf of Tonkin and the northern sea area of the Northern East Sea, the Northeast wind will gradually strengthen to level 6, gusting to 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.
