Rotor

{
  "id": "MLC-T-MET-008619",
  "term": "Rotor",
  "field": "Meteorology and atmospheric science",
  "definition": "A turbulent, horizontal roll cloud that forms on the lee side of a mountain range, often beneath a mountain wave crest. It is characterized by violent turbulence and strong vertical motions, posing a hazard to aircraft. These clouds are stationary relative to the ground but consist of rapidly circulating air.",
  "see_also": [
    "Rotor cloud"
  ],
  "url": "https://mlchart.com/terminology/meteorology/rotor/"
}