Cause of continuous hail
According to the National Center for Hydro-Meteorological Forecasting, hail is a phenomenon with stone particles of different sizes falling from strong convective thunderstorm clouds, growing very high, often occurring during storms. Strong thunderstorms occur during the transition from Winter to Summer and are often accompanied by showers with high intensity lasting from a few minutes to several tens of minutes.
In fact, in the past two days (March 27 and 28) in Yen Bai, Ha Giang, Lao Cai, Cao Bang or in Nghe An, there have been thunderstorms and hail causing damage to plants and animals. farming and housing.
Currently, the North and North Central regions are in the transition months, so thunderstorms are easily accompanied by extreme weather phenomena such as tornadoes, lightning or hail.
Stones with a diameter of 1 to 2 cm fell in Mai Son commune, Tuong Duong district, Nghe An. Photo: LM
On the evening of March 28, talking with Dan Viet reporter, Mr. Lu Van May - Deputy Secretary of Tuong Duong District Party Committee, Nghe An province confirmed the above information. Fortunately, the heavy hail did not cause any human damage, but some people's roofs were penetrated, and crops were crushed. shut up
The dispute between the two air masses combined with the westerly wind zone at an altitude of about 5.000m creates a strong updraft, causing convective clouds in the North to develop strongly and, as a result, hail appears in the North.
The cause of this hail wave is due to the impact of the front part of the cold air moving towards our country. Although the intensity and moving speed of the cold air waves are different, it is still disputed. with the hot and humid air mass that exists in the North.
Rain warnings will continue in the North today due to the convergence of moist clouds developing from an altitude of 1.500m to 5.000m. In particular, the rain will be concentrated in the Northwest region to the delta area, including the capital Hanoi, with the possibility of heavy rain accompanied by strong winds and even hail. can appear.
Hail is formed in thunderclouds with strong convection. The ice particles here will continuously be added to the water and gradually get bigger until convection can no longer push them up and will fall down and form hail. According to statistics, the size of hailstones can be from 0,5 cm to dozens of cm, equivalent to the size of a pea and gradually larger to a ball.
The larger the size of the stone particles, the more dangerous they will be and can puncture the roof and damage many people's crop areas.
Hail caused many people's plum areas in Moc Chau district, Son La province to fall. Photo: IT
Forecasting today, the probability of these phenomena occurring is still high. Especially in plain areas, there will be a risk of thunderstorms, while in mountainous areas, there will be warnings of both thunderstorms and hail with the level of danger depending on the size of the falling rocks.
Thunderstorm and hail warnings were also issued by the Hydrometeorological Center today and this evening (March 29) in a number of provinces and cities in the Central and Central Highlands regions. Although these phenomena may occur on a small scale, they have great destructive power, so people need to be careful to quickly find solid shelters when they see a strong thunderstorm coming.
According to the National Center for Hydrometeorological Forecasting, currently (March 29), in the Northern, North and North Central regions there are scattered showers and thunderstorms, locally with heavy to very heavy rain with high amounts of rain. Rainfall from 03:19 p.m. on March 28 to 3:03 a.m. on March 29 in some places is over 3mm such as: Yen Binh (Yen Bai) 40mm, Bach Ngoc (Ha Giang) 61mm, Huu Lung (Lang Son) 50.4mm, Phuc Yen (Tuyen Quang) 48.9mm, Hoa Thuong (Thai Nguyen) 48.8mm, Hong Son (Nghe An) 41mm,…
On March 29, in the Northern and North Central regions there were scattered showers and thunderstorms, locally there was heavy rain with rainfall from 3-10mm, in some places over 30mm. In the evening and evening of March 50, there were scattered showers and thunderstorms in the Central Central and Central Highlands regions, locally with heavy rain with rainfall of 29-3mm, in some places over 15mm. During thunderstorms, there is a possibility of tornadoes, lightning, hail and strong winds. Localized heavy rain has the potential to cause flash floods on small rivers and streams, landslides on slopes and flooding in low-lying areas.
Hail suddenly appeared in Mu Cang Chai district, Yen Bai province. Clip: Hoang Huu
Is consecutive hail an unusual phenomenon?
According to the National Hydro-Meteorological Center, during the change of seasons, thunderstorms and tornadoes will occur more frequently, focusing on from March to May, with the peak occurring in April. This is not a problem. unusual phenomenon that appears every year, at the time of changing seasons.
Experts say that in the coming time, not only the North but also most of the country will have a phase change in weather. In the Northern and Central provinces, the weather will change from cold to warmer weather, while in the Southern provinces it will change from a drier to a wetter period. Therefore, in the near future, we will see the probability of thunderstorms, lightning, hail, and strong winds increasing and peaking around April to May.
With dangerous weather phenomena that may occur in the near future, we will continue to improve prevention and raise awareness about hydrometeorology so that we can take proactive measures to prevent them. People should pay attention, first of all, they must follow forecast warning bulletins from central to local weather forecasting agencies to grasp the weather situation.
Next, there are prevention and living measures. After hearing the information warning about the above dangerous weather phenomena, we should avoid living, working, and working outdoors to avoid the effects of extreme weather phenomena, especially lightning. and hail. Continue to update weather and hydrometeorological information to be able to improve knowledge and experience to take proactive measures to prevent the obvious changes in natural disaster weather today.
