A field guide to the sky
Every cloud is telling you something
Photographs, plates and plain descriptions for the hundred-odd forms the atmosphere actually makes.
Recent entriesWeek 32
Low cloud — genusThe grey blanket that becomes fog
Supplementary feature — cavumThe hole-punch cloud that sparks UFO reports
Rare cloud — transient vortexA horseshoe that vanishes in minutes
Start from what you saw
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