What are the signs before the hail?

The signs before the hail are as follows:

1. If the morning is cool and the humidity is high in the hail season, and the sun radiation is strong at noon, resulting in strong air convection, it is easy to develop into cumulonimbus clouds and form hail.

2. Strong winds often appear before hail, but the wind direction changes violently.

3. It can be judged from the color of the cloud whether it hails or not. For example, at that time, the air convection was extremely strong, and the clouds developed rapidly, as if the thick smoke was rushing upward and the clouds rolled up and down, which made it easy to hail.

4. thunder is dull. Continuous, easy to have hail.

5. In general, lightning in hail clouds is mostly lightning between clouds, that is, "horizontal flash", which shows that the process of hail formation in clouds is very fierce.

6. There are many experiences in detecting hail by looking at objects. For example, there are proverbs in Guizhou, such as "The swan geese fly low, and the hail comes quickly", "The willow leaves turn over, and it hails in the sky", and in Shanxi, "Cattle and sheep don't lie on the beam at noon, so watch out for hail in the afternoon" and "The grass grows white beads, and the hail falls steadily".

it should be noted that the above experience should not be judged only on one item, but should be comprehensively analyzed and applied.