According to the National Center for Hydro-Meteorological Forecasting, currently, cold air has affected most places in the Northern and North Central regions. These areas have had rain, moderate rain and scattered thunderstorms, locally heavy to very heavy rain; temperature dropped by about 3 - 6 degrees Celsius. The north of the Gulf of Tonkin has recorded strong northeast winds at level 5, gusting at level 7.
On the day and night of May 4th, cold air continues to affect other places in the North, North Central region and some places in the Central Central region. Northeast wind on land is strong at level 2-3, coastal areas level 3-4.
The Northern and North Central regions are cool.
The Northern region has the lowest temperature of about 19 - 22 degrees C, the mountainous region has the lowest temperature below 19 degrees C. The average temperature is about 23 - 25 degrees C.
The North Central region has the lowest temperature of about 20 - 23 degrees C; the average temperature is about 23 - 25 degrees C.
Hanoi area has rain in some places; cool weather. The lowest temperature is commonly from 19 - 21 degrees C.
Regarding rain developments, on May 4, the southern area of the Northern Delta, from Thanh Hoa to Hue city, will have scattered showers and thunderstorms, rainfall of 10 - 30mm, locally heavy rain over 50mm.
In thunderstorms, there is a high possibility of tornadoes, lightning, hail and strong gusts of wind.
Rainstorms accompanied by extreme phenomena can affect agricultural production, infrastructure and people's livelihoods. Localized heavy rain is at risk of flash floods on small rivers and streams, landslides on slopes and flooding in low-lying areas.
At sea, in the north of the Gulf of Tonkin, strong northeast winds of level 4-5, sometimes level 6 during the day, gusts of level 7, waves 1.5 - 2.5m high, rough seas.
The northeastern sea area of the Northern East Sea has strong northeast winds at level 6, gusts at level 7 - 8, waves 2 - 3m high, rough seas.
Strong winds and big waves at sea directly affect the operation of ships and boats.
