Which parameter determines the elevation of the cloud base in a thundercloud?

The elevation of the cloud base in a thundercloud is significantly influenced by the dew point. The dew point is the temperature at which air becomes saturated with moisture, leading to the formation of clouds as water vapor condenses into liquid droplets. As warm, moist air rises, it cools, and once it reaches its dew point, the water vapor starts condensing, forming a cloud. The higher the dew point, the more moisture is available in the air, allowing cloud bases to form at higher elevations.

In a thundercloud scenario, a higher dew point means that the air can hold more moisture, which plays a crucial role in determining where the condensation starts and therefore where the cloud base is situated. While humidity, temperature, and pressure also play roles in cloud formation, the dew point specifically addresses the moisture content necessary for cloud base elevation, making it the key parameter in this context.