Why is it always raining at night in Tianjin recently?

Why does it thunder every night recently?

Meteorologists say that thunderstorms come from high-altitude confrontation between cold and warm air at night.

According to the analysis of meteorologists, strong convective weather such as thunderstorms around the evening is a common climate phenomenon just after entering the hot summer, which occurs almost every year until the end of June, but this year's thunderstorms are strong in intensity, high in frequency and long in duration, and the rainfall regularity in sunny days and nights is more obvious. This is mainly related to the daily temperature change and the movement of cold and warm air. During the day, under the action of solar radiation, the ground temperature rises obviously, gradually forming a strong updraft. At night, it collides with cold air mass at high altitude, forming strong convective weather. Under the fierce collision of cold and warm air, a thunderstorm will occur. Meteorologically, this is a typical vortex weather and a common weather type in summer.

Why is the thunderstorm so strong this year that it "must come" almost every day in recent days? Meteorologists explained that recently, due to the impact of typhoons, many provinces in China have experienced continuous heavy rainfall. Although the antenna of typhoon does not directly affect the north, the change of atmospheric circulation indirectly affects the weather change in the north. At the same time, in the context of global warming, the probability of extreme weather events will increase, and the increase of strong convective weather such as thunderstorms is also a manifestation.