What season does lightning happen?

Thunderstorms occur most often in summer, occasionally in spring or autumn, but most often in hot summer.

Thunderstorms can be divided into two types according to their causes: one is a hot thunderstorm caused by strong convection, which is common in summer afternoon, with a small range and short rainfall time; The other is the violent conflict between cold and warm air, which leads to the rise of warm and humid air, with a large range and long rainfall time.

In China, thunderstorms mostly occur in hot, humid and bad weather from May to August. Spring and autumn mainly occur in Jiangnan, with the least in winter. /kloc-after 0/0, there were thunderstorms in the vast area north of the Yangtze River. Judging from the time of day, it mostly happens in the afternoon and evening.

The general situation of lightning activity is as follows:

(1) Geological conditions: When the relative value of soil resistivity is small, it is beneficial to the rapid accumulation of charges. Places with small local resistivity are vulnerable to lightning; Resistivity mutation and underground conductive mineral deposits are vulnerable to lightning; In fact, the resistivity of grounding grid will increase the probability of lightning strike.

(2) Topographic conditions: the direction of the valley is consistent with the wind direction, and the tuyere or downwind valley is easily struck by lightning; Hillsides near lakes and oceans are more vulnerable to lightning.

(3) Ground conditions: It is beneficial to establish a good discharge channel between thunderstorm clouds and the earth. Isolated buildings in the open space, towering buildings in the complex are vulnerable to lightning; Trees, receiving antennas and transmission lines in mountainous areas are vulnerable to lightning strikes; In line with the characteristics of tip discharge, the probability of lightning stroke will also increase after the base station tower is built.