Recipe unearthed for mystery clouds
by Kate Ravilious from on (#2WT3J)
'Cotton wool' clouds above sub-tropical shores unmasked as formations caused by humidity variations high in the sky
The weather forecast had predicted a cloudless day, but when Ilan Koren, an atmospheric scientist, looked up he saw small "cotton wool" clouds dotted across the bright blue sky over Israel.
Related: Stunning 'new' cloud formations captured in updated atlas - in pictures
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