Unusual 'breaking wave' clouds graced Auckland sky last night

December 2, 2020

Aucklanders last night were treated to an unusual cloud formation across the sky.

MetService said the cloud formations are relatively uncommon, occurring a handful of times per year, and were commonly referred to as Kelvin-Holmholtz clouds.

The clouds are formed due to atmospheric instability when there is sufficient wind shear - the same force which is responsible for turbulence when travelling by aircraft.

MetService said they observe the clouds once every 1-2 months or so.

This image was sent to 1 NEWS by Tony Cooper. 

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