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Signs of supercilium, an unofficial classification of a short-lived cloud feature that is likened to an eyebrow and usually forms in turbulent air flow over, and to the immediate lee of, steep mountain peaks. This example was spotted over Antwerp, Belgium.
Rainbow spotted over Antwerp, Belgium
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A lightning strike with Mammatus (Mamma) formations spotted over Antwerp, Belgium
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Iridescence spotted over Antwerp, Belgium
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An expansive display of virga spotted over Antwerp, Belgium
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A leading edge of a storm system near Antwerp, Belgium
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Signs of altocumulus lenticularis amidst the variety of cumulus in the sky over Belgium
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Altocumulus radiatus over Belgium
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Pileus spotted over Belgium
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