April 1 1, 20 19, is 7: 30 pm the biggest hail in Shenzhen? What are the conditions for the formation of hail?

1 1 At night, the cold air goes south along the coast of South China, and violently confronts the southerly warm and humid airflow that controls our city for several days, releasing powerful energy in a short time. The weather in our city is fierce, and even hail appears in Guangming District and Baoan District. This hail warning is also the fifth hail warning signal in history.

What is strong convection?

Strong convective weather refers to a small-scale weather system that occurs in convective clouds or single convective clouds. The horizontal scale of this weather is generally within 200 kilometers, and some are only a few kilometers.

Strong convection is a strong vertical motion of the atmosphere driven by static unstable buoyancy. It is usually triggered by near-surface atmospheric warming or airflow convergence, and accelerated by buoyancy.

Strong convective weather can be manifested as wind, rain, lightning and other forms. Short-term heavy precipitation, storm, rainstorm, hail and tornado all belong to strong convective weather. Once it appears, it will bring many dangers to people. It is very important to learn how to prevent and deal with it.

These are all strong convective weather

Strong convective weather can generally be divided into six categories:

Squall line, thunderstorm gale, short-term heavy precipitation, thunderstorm, tornado and hail

Three characteristics

1

Short duration

Life history is about one hour to more than ten hours, and shorter ones are only a few minutes to dozens of minutes.

2

Strong locality

The influence range is generally from several kilometers to dozens of kilometers, and the horizontal scale of the squall line is even larger, reaching several hundred kilometers.

three

Strong changes in elements

In a short time, there will be a sudden increase in wind power, an increase in precipitation and obvious temperature changes.

In fact, this is not

It rained hail for the first time in Shenzhen.

Prior to this, Shenzhen * * * issued four hail warnings.

Last night was the fifth time.

The previous days were August 20 14, June 20 1 6 and July 30, 20 16 respectively.

August 26th, 20 17, and August 30th, 20 17.