@Jieyang Weather: Hail occurred in Rongcheng District and Airport District this afternoon, accompanied by short-term strong winds of magnitude 6-8 and gusts of magnitude 13. . . . . Who understands

Moisture in the atmosphere enters the atmosphere through the evaporation of various water bodies in the oceans and continents, as well as soil and plants. It is transported and exchanged through the movement of air currents. Although there is not much moisture in the atmosphere, its presence manifests itself in complex weather phenomena such as clouds, fog, rain, snow, frost, dew and hail.

Liquid or solid water falling from clouds to the ground like rain. Snow, hail, etc. are collectively called precipitation.

There are two causes, one is water vapor saturation, and the other is the presence of condensation nuclei (dust and impurities in the air) that can form precipitation

Clouds, rain, snow, hail, fog, Dew and frost are both members of the water family. When the sun shines on rivers, lakes, and seas, water evaporates. The water vapor rises to high altitudes with lower temperatures, liquefies into small water droplets or condenses into small ice crystals, forming blossoming flowers. White floating clouds. If you encounter cold air again, the small water droplets will gradually increase into large water droplets, and the white clouds will turn into black clouds. When large water droplets become heavier and heavier, they overcome the support of updrafts and fall to the ground. This is rain.

In winter, it is colder at high altitudes. The water vapor is cooled rapidly and condenses directly into small hexagonal ice crystals - snowflakes. When the snowflakes fall, they combine with each other and grow from small to large to become snow flakes or large snowflakes. , at this time, it started to snow heavily.

What happens when there is hail in summer? It turns out that when raindrops in the cloud encounter violent rising airflow and are carried to high altitudes below 0°C, they liquefy into small ice droplets; when the airflow weakens, the small ice droplets fall back; when the updraft containing water vapor increases again, The small ice beads then rise and grow; so dancing up and down, the small ice beads may gradually turn into large hailstones and finally fall to the ground.

When there is a lot of water vapor near the ground and encounters cold air, the water vapor will liquefy into small water droplets with the dust in the air as the core. This is fog.

In summer, the ground is very hot and there is a lot of water vapor. When the temperature is low before dawn, water vapor will condense on leaves, flowers and plants and become dew.

On winter mornings, the temperature on the ground is extremely low. When the water vapor is cold, it condenses into white frost on the ground.

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Rain: water vapor liquefies into small water droplets or ice crystals melt into small water droplets and falls to the ground as rain

Snow: water vapor condenses into ice crystals and falls to the ground

Cloud: water Steam liquefies into small water droplets or condenses into small ice crystals floating in the air

Fog: Water vapor liquefies on the ground into small water droplets floating near the ground

Dew: Water vapor forms on the ground Small water droplets liquefied on the plants

Frost: Small ice crystals formed by the condensation of water vapor attached to the ground or plants

Hail: As the water vapor in the clouds gathers, Rainfall will occur. If cold air is encountered during the rainfall, hail will form.