Understanding Hail: A Look at the Causes and Effects

Have you ever seen hail before? Do you know what is it and why does it form? Dien May XANH brings us more insights about this natural phenomenon that happens all over the world, especially in mountainous areas or areas bordering the sea or mountains. Keep reading to find out more!


Understanding Hail: A Complete Guide

Rainwater condenses and freezes into solid ice formations known as hailstones. This natural occurrence is influenced by thunderstorm clouds and the rapid onset of intense cold fronts. Hailstones can vary in size, ranging from approximately 5mm to several centimeters in diameter.

Hail is a meteorological phenomenon that typically lasts for a duration of 5 to 30 minutes and is often accompanied by showers. It is most commonly observed in mountainous regions or areas near the coast or mountains, occurring in both the rainy season and summer. In the northern region of our country, hail is particularly prevalent during the months of March to May.

Hiện tượng nước mưa đông tụ thành những tảng đá có đa dạng kích thước, hình dáng là mưa đá

What Causes Hail to Form?

When convectional air currents persist, hail is formed. This phenomena commonly occurs during the transition between the cold and hot seasons.

Khi các dòng không khí đối lưu hay nói cách khác là dòng không khí lên suốt liên tục thì sẽ hình thành mưa đá

If the temperature in the clouds drops below -20 degrees Celsius, the water vapor in the clouds will condense into small ice particles and precipitate. These small ice particles will then melt into water droplets with a temperature below 0 degrees Celsius when they encounter the lower cloud layer.

The atmospheric conditions cause continuous upward air currents, resulting in a significant influx of cold water droplets into the higher levels of the cloud. These droplets freeze upon contact with the existing ice particles, leading to the growth and accumulation of ice particles. Eventually, when the weight of these particles reaches a certain threshold, they will descend to lower altitudes.

When hail descends into the lower cloud layer, it becomes coated with a film of water and is subsequently impacted by rising air. Eventually, the air currents can no longer support the hail and it will fall to the ground, forming hailstones.

Khi mưa đá rơi xuống tầng mây thấp sẽ được bao bọc thêm một lớp màng nước

Know the 3 Different Types of Hailstorms

Hail takes on a wide range of sizes and shapes, but it can generally be categorized into two main forms:

  • Ice Granules: Also referred to as small hail, ice granules are typically spherical or conical in shape with a diameter of approximately 5mm.
  • Ice granules: Ice granules are characterized by their partial or complete transparency, as well as their irregular, conical, and spherical shapes. They typically have diameters ranging from 5 to 50mm and can fall from the cloud in a sporadic fashion or form an irregular curtain-like pattern.

Dangers of Hail Particles

Hail particles typically have a falling speed ranging from 30 to 60m/s, and in some cases, it can reach as high as 90m/s. This makes them highly perilous and destructive to humans, animals, and plants.

Mưa đá có đa dạng các kích thước và hình dáng khác khác nhau

Exploring the Reason Behind Hail Occurrences during Hot Seasons

Hail commonly occurs during the hot and humid season, particularly in the months of April, May, June, September, October, and November. This period coincides with the transition from cold to hot weather conditions. Hail formation is a result of strong convection currents.

During the hot and humid season, it is common for the water content in the air to increase. This is due to the lower atmosphere heating up as a result of absorbing a significant amount of heat. This leads to the formation of a column of hot air above colder air. During this time, the phenomenon of air convection becomes strong, causing a buildup of water in the clouds and resulting in hail formation.

Mưa đá chủ yếu xuất hiện trong mùa nóng ẩm và nắng nóng gay gắt

5 Indicators that Hail is Imminent

Hail, a unique weather phenomenon resulting from the convergence of hot and cold air currents, poses a challenge to forecasters due to its unpredictable nature. Recognizing the occurrence of hail is typically determined through the observation of various indicators, including:

  • The cloud resembles a shadowed silhouette of a breast.
  • Severe weather conditions characterized by strong winds, thunderstorms, and persistent buzzing and rumbling sounds.
  • The air temperature decreased significantly.

  • The Sound of Rainfall

    The soothing sound of rain falling on the roof resonated throughout the room, creating a peaceful ambiance.

Đám mây có dạng như hình bầu vú đen sẫm lại

The Disastrous Impact of Hail on Life and Property

Hailstorms pose significant threats, resulting in extensive property damage and endangering human life, as well as posing risks to animals and plants.

  • Impact on humans: Severe hailstorms can be life-threatening due to the large size and rapid descent of the hail. Furthermore, hail is known to puncture corrugated iron roofs, cause structural collapse of buildings, damage vehicles, and disrupt construction projects. Additionally, hail can create hazardous road conditions, leading to traffic accidents and posing risks to people’s safety and well-being.

  • Protecting Animals:

    Animals often suffer and perish in significant numbers due to harsh cold weather and hailstorms.

  • Effects on Plants

    Plants and fruits suffer various damages such as crushing, breakage, and falling branches, resulting in stunted growth and impaired reproduction. The soil also gets adversely affected by cold air, imposing further challenges for plant growth and propagation, ultimately leading to unbalanced vegetation.

Mưa đá xảy ra, gây nguy hiểm, thiệt hại rất lớn về của cải, đời sống

7 Effective Strategies to Avoid and Reduce Damage from Hailstorms

In order to mitigate the potential damage to individuals and infrastructure caused by hailstorms, it is advised to implement the following rational precautionary measures:

  • To ensure the well-being of plants and fruits, it is advisable to construct a sturdy roof capable of shielding them from potential damage caused by hailstorms. This protective measure will effectively mitigate the adverse effects of hailfall.
  • Roof:

    It is important to regularly inspect and reinforce the roof. In areas prone to hailstorms, it is recommended to use a roof with high impact resistance and soundproofing capabilities. Additionally, ensuring that the roof slopes down on both sides can help minimize the impact force and mitigate potential damage caused by hail.

Thường xuyên kiểm tra và gia cố lại mái nhà

  • House Inspection: It is essential to examine the house thoroughly, paying close attention to the roof frame structure. Ensure that the purlins are solid and have been reinforced properly. If any doubts arise, it is advisable to reconstruct and enhance the roof to guarantee the safety of your home.
  • Additional safety precautions: In the event of a severe and prolonged hailstorm, it is recommended to seek shelter under sturdy furniture such as a table or bed, or to find solid objects to protect your head and minimize the risk of injury.
  • Water Quality Testing: Hailwater often contains a high level of toxins that can be detrimental to human health. For your safety and to prevent any potential skin allergies, it is essential to check the quality of water before using or consuming it.

Bạn xem xét kết cấu khung mái, xà gồ có chắc chắn và được gia cố cẩn thận chưa

Thank you for reading this article on hail. We hope that it has provided you with a better understanding of what hail is and how to avoid it. If you have any further questions or concerns, please feel free to leave a comment below. We are here to help!