FAA Instrument Flight Instructor (FII)WeatherMedium
A CFII is briefing a student on the thunderstorm life cycle. During which stage is the storm characterized by continuous updrafts throughout the cell, with no precipitation yet reaching the surface?
- ACumulus stage
- BMature stage
- CDissipating stage
- DTowering cumulus stage
Show answer & explanationAnswer & explanation
Correct answer: A. Cumulus stage
The cumulus stage is dominated entirely by updrafts, which build the cloud vertically as moisture condenses; no precipitation reaches the ground because it's held aloft by the rising air. The mature stage begins once precipitation starts falling, marking the onset of downdrafts alongside updrafts.
Why the other options are wrong
- B. Mature stage includes both updrafts and downdrafts with precipitation.
- C. Dissipating stage is dominated by downdrafts and diminishing activity.
- D. Not a formal life cycle stage name; it's a cloud type sometimes seen in the cumulus stage.
Thunderstorm Life Cycle
Thunderstorms progress through three stages: cumulus (updrafts only), mature (updrafts and downdrafts with precipitation), and dissipating (downdrafts dominate).
- Cumulus stage: continuous updraft, cloud builds vertically
- Mature stage: precipitation begins, most hazardous stage
- Dissipating stage: downdrafts dominate, precipitation decreases
Memory trick: Cumulus Climbs, Mature Makes rain, Dissipating Dies down.