Question

How are thunderstorm occurred?

Answer 1

The air cools as it rises. Water vapor condenses and forms cumulus clouds. When condensation occurs, heat (latent heat/energy ) is released and helps the thunderstorm grow. 

Answer 2

$\textbf{Thunderstorm}$:

The swift movement of the falling water along with rising are producing sound, lightning, heavy rain, and strong wind is called thunderstorm.

$\textbf{How Thunderstorm forms ? }$

Warm air rises and carry water droplets. At higher altitude the water droplets freezes and falls down towards the earth. During this The frozen droplets melt to form water droplets which falls in the form of heavy rain. This falling water along with the rising warm air and lightning give rise to a thunderstorm.

Two important characteristics will be : moisture, sea breeze or mountains as they provide help in formation of a thunderstorm.