The unusual formation was believed to be a stratocumulus, a large, rounded masses of stratus that form groups, lines or waves. Herald readers snapped pictures and posted them under the Facebook post of this article

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Rustington Beach. Picture: Lisa Chamberlain | Other 3rd Party

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Clouds over the beach. Picture: Trevor John Coffey | Other 3rd Party

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Clouds over the seafront. Picture: Emma White | Other 3rd Party

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Clouds over Manor Retail Park. Picture: Selena Fletcher | Other 3rd Party
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