Helm wind

{
  "id": "MLC-T-MET-006221",
  "term": "Helm wind",
  "field": "Meteorology and atmospheric science",
  "definition": "A strong, cold north-easterly wind that blows down the western slope of the Cross Fell range of the Pennines into the Eden Valley of Cumbria, England. It is a mountain-lee wind, accompanied by a cap of cloud called the helm lying along the fell tops and a parallel roll of cloud called the helm bar, several miles downwind over the valley, beneath which the strong wind ceases.",
  "url": "https://mlchart.com/terminology/meteorology/helm-wind/"
}