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Lenticular clouds form characteristically

  • A.at the top of a growing cumulonimbus anvil
  • B.along the leading edge of a sea breeze front
  • C.in the wave crests downwind of a mountain range
  • D.in the centre of a large convective updraught

Answer: C

Correct answer: in the wave crests downwind of a mountain range

Stable air forced over a mountain range oscillates downwind in a train of standing waves, and cloud forms at each crest where the air is lifted and cooled. Because the wave is stationary while the air flows through it, the cloud appears motionless in a strong wind, continuously forming at its upwind edge and evaporating at the downwind one.

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