Rare cloud formation in central France likely to be a rolling cloud – .

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Rare cloud formation in central France likely to be a rolling cloud – .


A stunning cloud formation captured this weekend is most likely a rolled cloud – an extremely rare phenomenon in France that is more commonly seen in Australia or the United States.
The photos were taken by members of the Association Météo Center de Châteauneuf-sur-Cher on Saturday, October 23 in the morning and shared on the association’s social network accounts.

Rolled clouds are one of two types of arc clouds – low-lying, horizontal cloud formations typically associated with thunderstorms. While the most common “plateau clouds” are attached to the storm cloud, the roll clouds are separate from it and often appear to roll around a horizontal axis.

Arcus clouds are caused by a downdraft (downdraft) of an advancing storm, as the UK Met Office explains:

“When a cold downdraft… reaches the ground, cold air can travel rapidly along the ground, pushing the existing warm, moist air upward. As this air rises, the water vapor condenses in the patterns associated with arc clouds ”.

Rolling clouds, depending on conditions, “can last for several hours and stretch for several hundred kilometers,” said Stephen Corfidi, National Oceanic and Atmospheric Administration (NOAA) meteorologist Stephen Corfidi.

They can sometimes be difficult to see if there is moisture in the air, for example during a thunderstorm, and especially when hidden behind other clouds.

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