Aviation English
Meteorology

What is Rotor Cloud?

Rotor Cloud A turbulent, low-level cloud formation found downwind of mountain ranges, forming in the rotor zone beneath and near mountain waves; indicative of severe turbulence and hazardous for aviation.

Source: ICAO Doc 9432, FAA PCG

How is “Rotor Cloud” Used in Practice?

Report severe turbulence in the vicinity of a rotor cloud west of the airfield, maintain caution on approach.

Certification Exam Relevance

ICAO Level 4ICAO Level 5ICAO Level 6EASA FCL.055

Who Needs to Know This Term?

  • Pilots
  • Air Traffic Controllers
  • Cabin Crew

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Frequently Asked Questions

What is Rotor Cloud?

A turbulent, low-level cloud formation found downwind of mountain ranges, forming in the rotor zone beneath and near mountain waves; indicative of severe turbulence and hazardous for aviation.

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