What season does it usually hail?

Hail, also known as hail or cold wave weather, generally occurs in spring, summer and autumn. From April to July, hail accounts for 70% of the total. Hail is a kind of strong convective weather, and the most important feature of "strong convective weather" is the rapid evaporation of surface water. In China, strong convective weather generally occurs in summer when the temperature is high. In summer, there will be a summer monsoon blowing from the Pacific Ocean in China. The low pressure from Siberia forms strong convective weather. At this time, the water vapor in the warm and humid air from the Pacific Ocean directly condenses into a solid state due to the sudden drop in temperature, and falls down to form hail.

Extended data

Formation condition

There must be a fairly thick unstable layer in the atmosphere.

(2) Cumulonimbus clouds must develop to a temperature that can freeze a single large water droplet (generally, the temperature is-12 ~- 16℃).

③ There should be strong wind shear.

④ The vertical thickness of cloud should not be less than 6 ~ 8km.

⑤ Cumulonimbus clouds are rich in water content. Generally, it is 3 ~ 8 grams per cubic meter, and there is an accumulation area of liquid supercooled water above the maximum rising speed.

⑥ There should be inclined, strong and uneven updraft in the cloud, generally above10 ~ 20m/s. ..

Reference Hail _ Baidu Encyclopedia