An altocumulus mackerel sky (altocumulus undulatus) will often have long thick lines running perpendicular to the direction the upper wind is blowing. Mackerel Sky is also known as buttermilk sky. The clouds themselves will be substantial and opaque (see main picture above). Mackerel Sky refers to a sky covered with the altocumulus or cirrocumulus clouds. ‘Cirrocumulus is sometimes referred to as a mackerel sky because of the shapes it takes on.’ Usually, it indicates the transient levels and presence of moisture, which can result in thunderstorms or rain showers if the lower cumulus clouds transform to the altocumulus form. mackerel sky n. Chiefly Northeastern US A sky covered with many small cirrocumulus or altocumulus clouds, resembling the markings found on a mackerel. Also called regionally buttermilk sky. A sky covered with many small cirrocumulus or altocumulus clouds, resembling the markings found on a mackerel. THE AMERICAN HERITAGE® DICTIONARY OF THE ENGLISH LANGUAGE, FIFTH EDITION by the Editors of the American Heritage Dictionaries. Mackerel sky definition: a sky patterned with cirrocumulus or small altocumulus clouds | Meaning, pronunciation, translations and examples This indicates that an improvement is more likely. Definition of mackerel sky : a sky covered with rows of altocumulus or cirrocumulus clouds resembling the patterns on a mackerel's back Examples of mackerel sky in a Sentence Recent Examples on the Web This is certainly true of another of his award-winning shots, which shows a racehorse silhouetted against a stunning mackerel sky. mackerel sky n (Physical Geography) a sky patterned with cirrocumulus or small altocumulus clouds [from the similarity to the pattern on a mackerel's back] mack′erel sky′ n. a sky marked by cirrocumulus or … noun A sky dappled with rows of small white fleecy clouds, typically cirrocumulus, like the pattern on a mackerel's back. Also called Also called regionally buttermilk sky.

Search mackerel sky and thousands of other words in English definition and synonym dictionary from Reverso.