Weatherwatch: How English summer clouds can warn of trouble ahead
The News
The article discusses traditional English weather lore, where 'mackerel skies' and 'mare's tails' are said to signal the arrival of warm fronts. It describes mackerel skies as cirrocumulus or altocumulus clouds in patchy rows, and mare's tails as cirrus clouds. This folklore reflects historical knowledge used to predict summer weather changes.
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The Analysis
Intelligence Brief
Analyzed · High confidence (86%)
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'Mare’s tails and mackerel scales make lofty ships to carry low sails' is an old English saying about summer skies.
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Key findings
Mackerel skies and mare’s tails signal arrival of warm fronts.
The GuardianTrust Breakdown
Plain English
Loaded language removed<p>Mackerel skies and mare’s tails signal arrival of warm fronts that push moisture to high altitudes and creates distinctive clouds</p><p>“Mare’s tails and mackerel scales make lofty ships to carry low sails,” runs an old English saying about summer skies.</p><p>Mackerel skies are cirrocumulus or altocumulus clouds in regular but patchy rows, resembling the light and dark-scale pattern on a mackerel. The cirrocumulus version is white and wispy, altocumulus is grey and thicker.
Emotionally neutral rewrite. Same facts, calmer framing.
Claims
Mackerel skies and mare’s tails signal arrival of warm fronts.
The Guardian'Mare’s tails and mackerel scales make lofty ships to carry low sails' is an old English saying about summer skies.
OpinionMackerel skies are cirrocumulus or altocumulus clouds in regular but patchy rows.
The GuardianThe cirrocumulus version of mackerel skies is white and wispy; altocumulus is grey and thicker.
The GuardianCirrocumulus is narrower than a finger at arm's length, altocumulus more like three fingers.
The Guardian