Noticing an icy flower on the car’s roof when I looked out the front door on a chilly morning, I ran for my camera. The last time I saw such large ice crystals on that car was in late November, 2019. Fall and now spring – still, the conditions must have been just right for that to happen.
When the temperature is below 0°C (32°F) and supersaturated humid air flows over a textured surface, ice can be deposited directly without first going through a liquid phase. And as you can see, the results can be quite spectacular.
Radiant Refuge 