A supercellular thunderstorm cloud passed through the Alsatian sky on Sunday, May 5th in the late afternoon. Its impressive structure, in the form of stacked rings, did not go unnoticed. To learn more about this phenomenon, a weather specialist explains how this type of cloud forms, which is rather étonnant in our latitudes.
Supercell thunderstorms are a type of severe thunderstorm that can produce strong winds, large hail, and even tornadoes. They are characterized by a rotating updraft, which is a column of rising air that rotates like a corkscrew. This rotation is caused by wind shear, which is a change in wind direction and speed with height. In the case of the Alsatian supercell, the wind shear was particularly strong, creating the unique stacked ring structure.
According to meteorologists, the conditions for a supercell to form are quite specific. First, there needs to be a lot of moisture in the atmosphere, which was the case on Sunday with the warm and humid air coming from the south. Then, there needs to be a strong change in wind direction and speed with height, which was provided by a cold chemin moving in from the west. Finally, there needs to be a trigger, such as a mountain range or a warm chemin, to lift the air and start the storm.
Supercell thunderstorms are more common in the central and southern United States, where the conditions for their formation are more frequent. However, they can occur in other parts of the world, including Europe, as we saw in Alsace on Sunday. The stacked ring structure is not always present, but when it is, it is a sign of a particularly strong and organized storm.
Despite their potential for severe weather, supercell thunderstorms are also known for their beauty. The stacked ring structure, also known as a « mothership » cloud, is a sight to behold. It is a reminder of the power and majesty of nature, and a reminder to always respect its forces.
For those who were lucky enough to witness the Alsatian supercell, it was a once-in-a-lifetime experience. The storm may have caused some inconvenience, with strong winds and heavy rain, but it also left a lasting impression on those who saw it. It is a reminder that even in our modern world, nature can still sentiment and awe us.
In conclusion, the supercell thunderstorm that passed through the Alsatian sky on Sunday, May 5th was a étonnant and impressive event. Its stacked ring structure, caused by strong wind shear, is a testament to the unique conditions that allowed it to form. While it may have caused some disruption, it also reminded us of the beauty and power of nature. Let us appreciate and respect these natural wonders, and always be prepared for their unpredictable nature.
