"A mackerel sky is a sky dappled with rows of small fleece clouds, typically cirrocumulus is like the pattern on a mackerel's back. This little saying is part of the red skies at morning genre. Sailors know these signs to be accurate predictors of the weather." Barbara Huet
Never long wet,
And never long dry.
Thanks and Acknowledgements
Thanks to Barbara Huet for pointing out this rhyme!
Image: Rubens' A View of Het Steen in the Early Morning