A mackerel sky is an indicator of moisture and instability at high levels. If the lower
atmosphere is stable and no moist air moves in, the weather will most likely remain dry. However, moisture at lower levels combined with temperature instability can lead to spectacular
thunderstorms should the rising moist air reach this layer. In
weather lore, a mackerel sky portends changeable
weather.Photo credit:
Denni Windrim
A mackerel sky is an indicator of moisture and instability at high levels. If the lower
atmosphere is stable and no moist air moves in, the weather will most likely remain dry. However, moisture at lower levels combined with temperature instability can lead to spectacular
thunderstorms should the rising moist air reach this layer. In
weather lore, a mackerel sky portends changeable
weather.Photo credit:
Denni Windrim