Saturday, June 11, 2011

Mackerel Sky Today

Photo taken today At Deer Island Ferry Landing NB
Mackerel sky is a popular term for a sky covered with extensive cirrocumulus or altocumulus clouds arranged in somewhat regular waves and showing blue sky in the gaps. The pattern resembles the scales on a king mackerel, thus, the name.

Ripples of altocumulus resemble the skin of King Mackerel

Mackerel skies are spoken of  in the popular bywords; and of course there are weather lores associated to a mackerel sky. For example: Mackerel sky, mackerel sky - never long wet, never long dry. In the days of sailing ships they have been rightly viewed as likely forerunners of stormy weather: Mare's tails and mackerel scales make lofty ships take in their sails.

Photo taken today at Green Point Lighthouse, Letete, NB

Moisture at lower levels combined with surface temperature instability can lead to rainshowers or thunderstorms should the rising moist air reach this layer. In the winter it is often said to precede snowstorms and flurries.

Photo taken today at Green Point Lighthouse, Letete, NB