FAA Ground School Practice Test

During the life cycle of a thunderstorm, which stage is characterized predominantly by downdrafts?

1. Developing stage

2. Mature stage

3. Dissipating stage

4. Initial stage

The correct answer is: Dissipating stage

The dissipating stage of a thunderstorm is characterized predominantly by downdrafts. During this final phase of a thunderstorm's life cycle, the storm is in decline as the moisture supply weakens. The heavy precipitation that had been typical in the mature phase begins to diminish, and downdrafts become the dominant feature. In this stage, the previously strong updrafts that contributed to storm growth begin to weaken as the available warm, moist air is depleted. As the downdrafts prevail, they cause the storm to lose its structure, leading to a decrease in intensity and eventually to the storm's dissipation. This progression marks the end of significant thunderstorm activity, as the storm relies on the rise of warm, moist air, which is no longer sufficient to sustain itself.