Hail weather in Guizhou caused damage to many vehicles. What is the principle of hail formation?

Today let’s talk about the principle of hail formation?

In fact, the process of hail formation is very complicated, and thunderstorms often occur when hail falls.

Hail is actually produced from very strong cumulonimbus clouds. The diameter of hail can reach more than 5 mm, and it can be spherical, conical, irregular, etc.

The individual hail clouds are very tall, just like towering mountains. Hail clouds are further developed from thunderclouds, and the cloud layers of hail clouds are very thick. In hail clouds, the temperature convection is very strong, and the top of the clouds are The altitude can reach an altitude of more than 10,000 meters, and the temperature is generally minus 30 to 40 degrees Celsius, and the lower part of the cloud body is warm cloud, which is about 1 kilometer above the ground, and the temperature is relatively high. Most of the clouds here are water droplets.

In the middle and upper part of the hail cloud are cold clouds, which are mainly composed of small snowflakes, supercooled water droplets, and ice crystals. The updraft in the hail cloud is very strong, and it continuously blows the lower part of the hail cloud. The growing water droplets are transported to the middle of the hail cloud, thereby turning into supercooled water droplets. The sinking airflow in the hail cloud will bring the snowflakes and ice crystals in the upper part of the hail cloud to the middle of the hail cloud.

This gives the supercooled water droplets brought from the lower part of the hail cloud to the middle and the ice crystals and snowflakes brought from the upper part of the hail cloud to the middle have a chance to collide together, and gradually grow to form naturally frozen ice. drop.

These ice droplets are the core of hail. Due to hail, the water content in the cloud is very rich, and the updraft and downdraft are also constantly undulating in the hail cloud, so a large number of supercooled water droplets are in the ice. Hail cores form when the ground freezes.

These ice film boxes will continue to rise and fall in the hail cloud with the updrafts and downdrafts in the hail cloud. They are always moving, just like rolling snowballs, and these hail nuclei will In the hail cloud, the downdraft will carry it to the bottom of the hail cloud, where it will be stained with supercooled water, and then it will be carried to the middle by the updraft, where it will freeze as ice droplets. Repeatedly, these hailstones will become larger and larger.

When the hailstones become larger and larger, and these updrafts can no longer set off the enlarged hailstones, these hailstones will fall to the ground from the hail clouds, and then become our These hailstones I saw.