According to the Northeast monsoon forecast bulletin of the National Center for Hydro-Meteorological Forecasting, around early morning and on October 1, this cold air mass will affect the Northeast region, then affect most of the Northwest region, North Central region and some places in the Central Central region.
Northeast wind level 3 inland, level 4-5 coastal areas.
During this cold spell, the weather in the North and North Central regions will be cool; cold at night and early morning, especially in the mountainous areas of the North. The lowest temperature in the North and Thanh Hoa is generally from 19-22 degrees Celsius, in mountainous areas 17-19 degrees Celsius, in high mountainous areas below 16 degrees in some places; in Nghe An-Ha Tinh, the lowest temperature is generally from 20-23 degrees Celsius.
From noon on October 1, in the Gulf of Tonkin, the Northeast wind gradually increased to level 6, gusting to level 7-8; rough seas; waves 1.5-2.5m high.
Before the cold air arrives, from the evening and night of September 29 to the night of September 30, in the Northern region and Thanh Hoa, there will be moderate rain, heavy rain, locally very heavy rain and thunderstorms with common rainfall of 40-120mm, locally over 200mm. During thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind.
Thunderstorms accompanied by tornadoes, lightning, hail and strong winds can affect agricultural production, cause trees to fall, damage houses, traffic works and infrastructure.
Heavy rains can cause flooding in low-lying areas; flash floods in small rivers and streams, and landslides on steep slopes.
Meteorologists warn that strong winds and large waves at sea are likely to affect shipping and other activities.
Tourists planning to explore the islands or cruise in the Gulf of Tonkin in the next two days should pay attention to weather forecasts to prepare suitable clothing and adjust their schedules if necessary.
