A “fog bow” was seen over fields in western Minnesota on Sunday, December 29, creating a ghostly pale cousin to a rainbowA “fog bow” forms in a very similar way to a normal rainbow, with sunlight refracting through water droplets, according to the BBC. But with fog, water droplets in the air are smaller, causing interference in how the colors split from the sunlight creating the pale white halo.In this footage captured with a drone, the phenomenon can be seen as fog covers western Minnesota.Fog is expected to persist in the area, according to local reports. Credit: Carol Bauer via Storyful