Knuckles

{
  "id": "MLC-T-MET-001491",
  "term": "Knuckles",
  "field": "Meteorology and atmospheric science",
  "definition": "Slang for lumpy protrusions on the edges, and sometimes the underside, of a thunderstorm anvil. They usually appear on the upwind side of a back-sheared anvil, and\nindicate rapid expansion of the anvil due to the presence of a very strong updraft. They are not mammatus clouds. See also cumuliform anvil and anvil rollover.",
  "see_also": [
    "Cumuliform Anvil",
    "Anvil Rollover"
  ],
  "references": [
    "NWS Glossary"
  ],
  "url": "https://mlchart.com/terminology/meteorology/knuckles/"
}