Colorful photochallenge scenery rarely seen

usually the sky looks light blue with a little cloud decoration around it, but times I see clouds with a strange sight even I have never seen before though. the clouds in the sky that I see this time shaped like waves of snow in the winter. I first saw this scene when I was traveling somewhere, in the middle of my journey I saw a sight that struck me as strange, I immediately took a photo of this scene to my capture, this incident happened a few days ago.