What initial condition is necessary for the formation of thunderstorms?

The formation of thunderstorms primarily requires sufficient water vapor in the atmosphere. When there is an adequate amount of moisture present, it can rise and condense as it cools, forming clouds and releasing latent heat. This process not only contributes to cloud development but also creates the instability needed for strong updrafts, which can lead to the formation of thunderstorms.

Without a sufficient amount of water vapor, the air would lack the necessary moisture to condense into droplets, thereby inhibiting cloud formation and the subsequent development of thunderstorms. This essential role of water vapor highlights its importance in the process, making it a critical initial condition for thunderstorm development.