View of mackerel sky and old pump station beside the Cromford Canal, Derbyshire, England, United Kingdom, Europe

View of mackerel sky and frosty morning at the Cromford Canal, Derbyshire, England, United Kingdom, Europe

Mackerel skies over Red Screes in the Lake District, Cumbria, England, United Kingdom, Europe

Mackerel skies, a sign that weather is breaking down and a storm is on the way, Ambleside, Cumbria, chatsworth house

Climate, Weather, Cloud Formations, Alto Cumulus or Mackerel sky pattern