1. A mackerel sky and mares'tails make lofty ships carry low sails.
2. Mackerel sky in Lincolnshire, England.
3. A mackerel sky is never long dry.
4. The next morning, a mackerel sky hung over Tokyo.
5. A mackerel sky is a sure sign of rain to come.
6. Mackerel sky is a kind of weather phenomenon which forecasts the upcoming cold air in autumn and winter.