According to the National Center for Hydro-Meteorological Forecasting, cold air has affected the Northeast region of the Northern region. In the Northern region, there are showers and thunderstorms, locally heavy to very heavy rain; the temperature drops by about 2 - 5 degrees Celsius.
On the day and night of April 23, cold air will continue to affect other places in the Northeast region, North Central region and some places in the Northwest region.
Mr. Mai Van Khiem, Director of the National Center for Hydro-Meteorological Forecasting, said that the time when cold air affects will combine with a wind convergence zone operating at an altitude of 1500 - 5000m.
On the day and night of April 23, the Northern region will have rain, moderate rain and scattered thunderstorms, with locally heavy to very heavy rain. From April 23 to April 24, the North Central region will have rain, moderate rain and scattered thunderstorms, with locally heavy to very heavy rain. From the evening of April 23 to April 25, the Central Central region will have showers and scattered thunderstorms" - Mr. Khiem said.
Representatives of the meteorological agency also said that due to the impact of cold air, the Northeast and North Central regions are cool. The lowest temperature in this cold air wave in the Northern region is commonly from 20 - 23 degrees C, mountainous areas have places below 20 degrees C. The average temperature is about 23 - 25 degrees C, mountainous areas have places below 22 degrees C.
The North Central region has the lowest common temperature from 21 - 24 degrees C, the average temperature is 23 - 25 degrees C.
Hanoi area on the day and night of April 23 has showers and scattered thunderstorms, locally heavy rain; cool weather. The lowest temperature in this cold air wave is commonly 21 - 23 degrees C.
According to Mr. Khiem, the dispute between the cold air mass and the hot, humid air mass previously in the North and central provinces will create a strong convection current.
The risk of tornadoes, hail and gusts of wind will appear from now and this risk will be maintained until April 24. Among them, the high-risk areas for tornadoes, hail and strong gusts of wind will be the midlands and northern mountainous areas, the western mountainous areas of the central provinces and cities from Thanh Hoa inwards to Hue city" - Mr. Khiem emphasized.
The meteorological agency warns that thunderstorms accompanied by tornadoes, lightning, hail and strong gusts of wind can affect agricultural production, causing trees to fall, damage to houses, traffic works, and infrastructure. Localized heavy rain may cause flash floods on small rivers and streams, landslides on slopes, and flooding in low-lying areas.
At sea, on April 23, in the northern Gulf of Tonkin sea area, there will be strong northeast winds of level 5, sometimes level 6, gusts of level 7, rough seas, sea waves 1.5 - 2.5m high. Strong winds and gusts, large waves at sea are likely to affect the operation of ships and other activities.
Notable recommendations:
When there is a risk of thunderstorms, tornadoes, hail and strong gusts of wind, people need to closely monitor warning bulletins and limit going out when the weather turns thunderstormy.
If you are outdoors, you need to quickly find a safe shelter in a solid house, avoid standing under big trees, power poles, billboards or temporary structures.
When it rains heavily, you should stay indoors, close the doors tightly, and stay away from glass doors to limit breakage and injury.
For strong gusts of wind, it is necessary to reinforce the roof, reinforce items that are easily blown away by the wind, and not stay near areas at risk of collapse.
In addition, turn off electrical devices when there is lightning, limit the use of phones outdoors to reduce the risk of being struck by lightning.
