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A classic example of Virga, where precipitation evaporates when it falls into a layer of dry air, spotted over Stuttgart, Killesberg, Germany
Fallstreak Hole (Cavum) spotted over North Munich, Bavaria, Germany
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Altocumulus radiatus indicates instability at mid-atmospheric levels and often signaling approaching stormy weather. This was true in this case as Bernhard indicated that it rained only two hours later, near the English Garden, Munich, Germany.
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Altocumulus lenticularis spotted overhead during a salmon fishing expedition in Argentina
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Altocumulus stratiformis undulatus, also known as a 'mackerel sky', spotted over Penobscot Bay, Maine, US
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A spectacular example of a multi-layered Altocumulus lenticularis duplicatus, also known as 'pile d'assiettes', spotted by Keith Johnson while salmon fishing in the Andes, Argentina
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Supercilium are short-lived cloud formations that resemble eyebrow-like features and appear in turbulent airflow over, and to the immediate lee of, steep mountain peaks, as spotted here over Santa Barbara, California, US
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Altocumulus lenticularis duplicatus, also known as 'pile d'assiettes', spotted over Iceland
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A distrail cutting through the Altocumulus perlucidus, spotted over Holwood, Kent, England
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Altocumulus lenticularis spotted over Gaw Hill, Ormskirk, England
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A classic example of Mammatus (Mamma) spotted in a colourful light over Wells, Somerset, England
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Fluctus (Kelvin-Helmholtz) spotted over Cascade, Idaho, US
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Iridescence spotted over Broomfield, Colorado, US
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A unique example of Altocumulus lenticularis duplicatus, also known as 'pile d'assiettes', spotted over Sheffield, Canterbury, South Island, New Zealand
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An expansive display of virga spotted over Antwerp, Belgium
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Altocumulus stratiformis undulatus spotted over Cape St Vincent, Algarve, Portugal
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