Clive Cooksey kindly sent us this photo of a "VERY rare cloud formation over Wilmslow again that lasts just seconds".
He said "It's called a Cirrus Kalvin-Helmholtz formation. It is caused by winds blowing harder at the upper level than the lower."
If you would like your photos of Wilmslow and the surrounding area to be considered for publication on wilmslow.co.uk then please email them to [email protected].
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The Kalvin-Helmholtz cloud phenomena in the photograph is caused when layers of air in the atmosphere are moving at different speeds and the 'shear' between them deforms the cloud. Though such clouds are rare, the phenomena itself is common elsewhere in nature and is the cause, for instance, of waves being formed when a wind blows over the sea.