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.

1. A mackerel sky and mares'tails make lofty ships carry low sails.