The symbol is loading, what symbol is used to represent hail, and the hail map is in brackets.

The symbols of hail in the weather forecast are as follows:

Grade marks of hail in weather forecast;

Hail disaster is a serious meteorological disaster caused by strong convective weather system. Although it appears in a small range and in a short time, it is fierce and strong, and is often accompanied by other weather processes such as strong winds and heavy rains.

China is a country with frequent hail disasters. Hail brings huge losses to agriculture, construction, communication, electricity, transportation and people's lives and property every year. Many people have encountered hail in thunderstorm weather. Usually, these hailstones will not exceed the size of softball, they fall from the storm clouds.

Extended data:

According to the maximum hail (general hail) diameter, hail accumulation time and hail accumulation thickness in a hail process, the hail is divided into three grades.

1, light hail: the diameter of most hail is less than 0.5cm, the cumulative hail falling time is less than10min, and the hail thickness in the area is less than 2cm.

2. Moderate hail: The diameter of most hail is 0.5 ~ 2.0 cm, the cumulative hail falling time is 10 ~ 30 minutes, and the hail thickness is 2 ~ 5 cm.

3. Heavy Hail: Most hailstones have a diameter greater than 2.0 cm, the cumulative hail time is greater than 30 minutes, and the hail thickness is greater than 5 cm.

Prediction of hail;

Feel hot and cold: If the hail season is cool in the morning, with high humidity and strong solar radiation at noon, resulting in strong air convection, it is easy to develop into cumulonimbus clouds and form hail. Therefore, there is a saying that "the morning is chilly, and the head is broken in the afternoon" and "the dew is heavy in the morning and the hail is fierce in the afternoon".

Cloud-watching state: There are many proverbs all over the country to explain the precursor of hail from the color of the cloud, such as "If you are not afraid of black in the cloud, you are afraid of red in the cloud, and you are most afraid of white worms growing in the red Huang Yun" and "The tail of the cloud kills cattle and sheep", because the top of the hail is black at first, and then red in the middle, forming white, black and red clouds with yellow edges.

Listen to the thunder: the thunder is dull. In succession, the masses called this kind of thunder "Remore". Therefore, there is a saying that there is nothing wrong with thunder, and it is boring to lay an egg. This is because the frequency of horizontal flash in hail cloud is higher than that of vertical flash, and the range is wide The thunder and echoes emitted by various parts of lightning are mixed together and sound continuous.

Understanding lightning: Generally, lightning in hail clouds is mostly inter-cloud lightning, that is, "horizontal lightning", which shows that the process of forming hail in clouds is very difficult. Therefore, there is a saying that "vertical lightning can come, and horizontal lightning can prevent hail disasters".

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