Rotor cloud

{
  "id": "MLC-T-MET-002363",
  "term": "Rotor cloud",
  "field": "Meteorology and atmospheric science",
  "definitions": [
    "A turbulent, cylindrical cloud that forms in the lee of mountain ranges, associated with mountain waves. It indicates the presence of strong vertical air currents and severe turbulence. These clouds are stationary relative to the terrain but contain rapidly circulating air, making them hazardous for aviation.",
    "A turbulent altocumulus cloud formation found in the lee of some mountain barriers when winds cross the barrier at high speed. The air in the cloud rotates around an axis parallel to the range. Also called a roll cloud."
  ],
  "synonyms": [
    "roll cloud"
  ],
  "see_also": [
    "Bishop wave"
  ],
  "references": [
    "NWS Glossary"
  ],
  "url": "https://mlchart.com/terminology/meteorology/rotor-cloud/"
}