weather theoryFAA-published question bank (Private Pilot, 2008)
Which weather phenomenon signals the beginning of the mature stage of a thunderstorm?
A
The appearance of an anvil top.
B
Precipitation beginning to fall.✓ Correct Answer
C
Maximum growth rate of the clouds.
Explanation
PHAK Chapter 12 explains that the mature stage begins when precipitation starts falling from the cloud base, as the rain drags air down and creates downdrafts alongside the updrafts. The anvil typically appears later in the mature stage, and maximum growth rate belongs to the cumulus stage.
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