According to the National Center for Hydro-Meteorological Forecasting, around the morning of October 19, cold air will affect the Northeast region; from October 20 to 22, cold air will be strengthened, affecting other places in the Northeast and North Central regions, then affecting some places in the Northwest and North Central regions.
On the night of October 18 and October 19, in the Northeast region, there will be scattered showers and thunderstorms. Inland, the wind will change to Northeast level 2-3, coastal areas level 3-4.
From the night of October 20, the weather in the Northern region will turn cold at night and morning, and cold in mountainous areas. The lowest temperature during this cold air mass in the Northern Delta is generally 19 - 21 degrees Celsius; in mountainous and midland areas 17 - 19 degrees Celsius; in high mountainous areas, some places are below 16 degrees Celsius.
Hanoi area on the night of October 18 and the day of October 19 will have rain, scattered showers and thunderstorms in some places. From the night of October 20, the night and morning will be cold. The lowest temperature in this cold air mass is commonly 19 - 21 degrees Celsius.
At sea, from October 19, the North East Sea area will have strong Northeast winds of level 6, gusts of level 7 - 8, rough seas; in the Eastern sea area, winds will gradually increase to level 6 - 7, near the storm center, strong winds of level 8, gusts of level 10, rough seas, waves 2.5 - 4.5m high.
From the evening and night of October 19, in the Gulf of Tonkin, the Northeast wind will gradually increase to level 6, gusting to level 7-8, rough seas, waves 1.5-3m high.
Due to the influence of cold air, from the evening and night of October 19, there will be rain, moderate rain and thunderstorms in the North and Central Central regions, and some places in the South will have heavy rain. Thunderstorms accompanied by whirlwinds, lightning, hail and strong gusts of wind can affect agricultural production, cause trees to fall, damage houses, traffic works and infrastructure.
Experts warn that heavy rains can cause flooding in low-lying areas; flash floods on small rivers and streams, landslides on steep slopes; heavy rain in a short period of time can cause flooding in urban areas and industrial zones. Strong winds and gusts, large waves at sea can affect the operation of ships and other activities. Cold weather at night and in the morning can affect health.
Source: https://baotintuc.vn/xa-hoi/mien-bac-sap-don-khong-khi-lanh-va-mua-dong-20251018105402476.htm
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