What is an important factor affecting the speed of atmospheric phenomena like thunderstorms?

The speed of atmospheric phenomena, such as thunderstorms, is critically influenced by pressure difference. This difference, or gradient, between air masses at various altitudes creates forces that initiate and enhance wind, which plays a vital role in the development and movement of thunderstorms. When there is a significant pressure difference, it results in increased wind speeds, which can rapidly carry thunderstorms across large areas.

While humidity, temperature, and cloud condensation are important in determining the characteristics and intensity of storms, they primarily influence the formation and precipitation aspects rather than the speed at which the phenomena move. Pressure differences directly impact wind velocity and are therefore the key factor in the dynamics of storm systems.