Is the weather the same before and after the thunder?

The weather before and after the thunder is different.

Lightning is a discharge phenomenon in the atmosphere. Thunder is usually accompanied by lightning and thunder. It accumulates in thunderstorm clouds and forms polarity, which is generally produced in strong convective cumulonimbus clouds. Therefore, thunder weather is often accompanied by strong gusts and heavy rains, and occasionally there are abnormal weather phenomena such as hail or tornado.

Lightning is mostly formed in cumulonimbus clouds, which will move with the change of temperature and airflow. During the movement, triboelectricity forms charged clouds, some of which are positively charged and some are negatively charged. In addition, buildings and trees under clouds often have opposite charges due to electrostatic induction. With the accumulation of charge, the voltage of Lei Yun gradually rises. When the Lei Yun with different charges and the earth bulge are close to each other to a certain extent, the electric field between them will exceed 25 ~ 30 kV/cm, resulting in strong discharge and strong flash. Because the temperature is as high as 2000℃ when discharging, the air expands rapidly when heated, and then there is the roar of explosion, which is lightning and thunder.

Therefore, there are dark clouds before thunder, and there are storms or strong gusts after thunder. After the thunderstorm, the sky was clear in Wan Li.