Occurred on September 17, 2017 / Timis County, Romania
Info from Licensor: "We went from Timisoara to Bocsa to take our children to stay with their grandparents for couple of days. It was warm and sunny. However, one hour later, we noticed dark clouds on the sky, and a strange light brown cloud at the horizon. Minutes later we were below or in the cloud, and this is how it was."