What are the signs of a thunderstorm?

The weather symbols of thunderstorms are as follows:

When a thunderstorm comes, there are often strong winds and thunderstorms. Persistent and intense thunderstorms can often reach the level of heavy rain.

Distribution characteristics

Judging from the time of day, thunderstorms mostly occur in the afternoon and evening.

There are more opportunities on land when the thermal convection is strong in summer afternoon, forming a "thermal thunderstorm". At sea, thunderstorms often occur at night because of the slow cooling of the sea surface and unstable air at night. Thunderstorms near the front can occur simultaneously. In mountainous areas, topographic precipitation can occur. Thunderstorms are usually paroxysmal, and there are often strong winds.

Sometimes accompanied by tornadoes and hail. Persistent and intense thunderstorms can often reach the level of heavy rain. The most active areas of thunderstorms in the world are the tropics and mountains. There are 75- 100 thunderstorm days in the tropics, 20-50 thunderstorm days in the middle latitudes, only a few thunderstorm days in the polar regions, and there are no thunderstorms all the year round north of 82 degrees north latitude.