Striations

{
  "id": "MLC-T-MET-002672",
  "term": "Striations",
  "field": "Meteorology and atmospheric science",
  "definitions": [
    "Parallel lines or bands of cloud, often seen along the edges of a thunderstorm's anvil or within wave clouds. These features indicate variations in airflow and shearing motion, where layers of air are moving at different speeds or in slightly different directions. In severe thunderstorms, prominent striations on an updraft tower can signify strong rotation within the mesocyclone.",
    "Grooves or channels in cloud formations, arranged parallel to the flow of air and therefore depicting the airflow relative to the parent cloud. Striations often reveal the presence of rotation, as in the barber pole or \"corkscrew\" effect often observed with the rotating updraft of a Low Precipitation (LP) storm."
  ],
  "references": [
    "NWS Glossary"
  ],
  "url": "https://mlchart.com/terminology/meteorology/striations/"
}