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Image du jour - 2023-06-05

English: A Doppler on Wheels image of a tornadic thunderstorm near La Grange, Wyoming (USA) captured during the VORTEX2 project. In the velocity image on the left, Blues/green represent winds moving towards the radar, and reds/yellows indicate winds moving away from the radar. The reason that some of the darker blues contain red/yellow within them is a trait known as Aliasing, where the winds are moving faster than the radar can detect. In the reflectivity image on the right, the main body of the storm can be seen, with the appendage on the bottom of the storm being a hook echo, which is associated directly with the tornado, and the tornado circulation itself can be seen as the doughnut like shape in the later part of the animation.
Français: Images d'une tempête accompagnée d'une tornade enregistrées par radar Doppler on Wheels dans le Wyoming (États-Unis).
Español: Imagen radar de una tormenta de tornados cerca de La Grange (Wyoming), Estados Unidos, producida en el ambito del proyecto VORTEX2. La imagen de la izquierda representa la fuerza de los vientos, en azul los vientos que soplan hacia el radar, y en amarillo/rojo los que se alejan. Los puntos rojos sobre fondo azul son artefactos (aliasing) debidos a vientos que soplan a una velocidad superior al límite de detección del radar. La imagen de la derecha mide la reflectividad, y podemos ver la nube de tormenta principal, así como el eco en cadena del propio tornado. Al final de la animación, vemos el propio tornado, en forma de anillo marrón.

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I'm a writer, and have published three science fiction short stories in anthologies. I also used to be the Volunteer Coordinator for the Wikimedia Foundation.

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