Extraordinary Weather Phenomenon: Morning Glory Rolling Cloud

Des nuages Morning Glory au Queensland en Australie. © Mick Petroff

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[EN VIDÉO] 5 clouds to recognize to predict the weather For millennia, men have learned to predict the weather thanks to nature’s clues. Between them, clouds can give a good idea of ​​the weather in the short term. Morning Glory Clouds are formations that are rarely seen, but when they appear, the images turn the world around every time. These cloud tubes can appear alone or in parallel groups. Each band can be up to 1,000 km long, 1 to 2 km high and move at about 40 km/h They circulate at very low altitude, between 100 and 200 meters above the ground, which makes them even more impressive Unlike many clouds that deform as they travel along currents aloft, the Morning Glory moves steadily forward without changing shape, and that over hundreds of kilometers. The passage of each cloud tube is accompanied by a sudden onshore wind, at 40/50 km/h, lasting no more than a few minutes With the end of the dry season in Australia, the morning glory clouds. You can see it in the image above, they are tube shaped clouds. They can reach a kilometer in height and a mile in length. pic.twitter.com/q2DacGGuxs— Fátima MEDDAHI (@fatima_meddahi) July 9, 2021An observable cloud in September and October They appear in northern Australia, especially in the Gulf of Carpentaria, in late summer and early autumn: September and October are the best months to observe them, sometimes also in early November. Why do Australians call them Morning Glory? Because these clouds are generally formed at dawn, but not only. Some have already been reported in the evening, and even in the middle of the night. They were first described in 1942, in a report by Royal Australian Air Force pilots. Their study only really began in 1979 and continues today. The formation process of the Morning Glory is still quite mysterious, and Australian meteorologists do not all agree on the various hypotheses proposed. The Morning Glory is not the same type of bow as the scroll bow that occurs before some storms, but it does look like one. It’s not often you see clouds like this from the ground, let alone from the air! Our Mount Isa crew captured amazing video of the Morning Glory cloud formations as they flew over Gregory Downs near the Gulf of Carpentaria. ☁️☁️ pic.twitter.com/0F0YkVA460— Royal Flying Doctor Service (@RoyalFlyingDoc) November 7, 2021 Their presence in this specific area of ​​Australia is linked to the relief and microclimate characterized by sudden pressure changes. It is a wave cloud whose formation depends on the sea breeze: the air rises and cools, the moisture condenses and a cloud forms. But the specific currents in this area cause these cloud particles to descend and evaporate, which would result in this roll shape. pic.twitter.com/KjAa416mpI— Ben Domensino (@Ben_Domensino) July 25, 2022 Some Morning Glory clouds have already been observed outside Australia, but very rarely: in Uruguay, Mexico, the United States ( Oklahoma and the Great Lakes), in Canada (Nova Scotia), in Russia, in Germany, and even on the coasts of the Channel and the Vendée. “Morning Glory” cloud along Lake Michigan in the United States. © Chad Bousamra Interested in what you just read?
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