FAA Aircraft Dispatcher (ADX)MeteorologyMedium
During which stage of a thunderstorm's life cycle do updrafts and downdrafts coexist within the cell, with precipitation just beginning to reach the surface?
- ACumulus stage
- BDissipating stage
- CMature stage
- DTowering cumulus stage
Show answer & explanationAnswer & explanation
Correct answer: C. Mature stage
The mature stage begins when precipitation starts falling from the cloud base and reaches the surface. This stage features the coexistence of strong updrafts and downdrafts, producing the most intense turbulence, heavy rain, lightning, and possible hail and gust fronts.
Why the other options are wrong
- A. The cumulus stage is dominated entirely by updrafts, with no precipitation reaching the surface yet.
- B. The dissipating stage is dominated by downdrafts as the storm weakens and rainfall diminishes.
- D. This is not a formally recognized separate stage; the correct name for the developing stage is the cumulus stage.
Thunderstorm Life Cycle
A thunderstorm cell progresses through three stages: cumulus (updrafts only), mature (updrafts and downdrafts, precipitation begins), and dissipating (downdrafts dominate, storm weakens).
- Cumulus stage: updrafts only, no precipitation yet
- Mature stage: precipitation begins, updrafts and downdrafts coexist, most severe hazards
- Dissipating stage: downdrafts dominate, rainfall decreases, storm weakens
Memory trick: 'Cumulus grows Up, Mature mixes Up and Down, Dissipating goes Down.'