"Sundogs are a neat winter treat. The sun's light is getting bent by ice crystals in some of the highest clouds in the sky. What happens is the light hits these ice crystals, and, where the light normally goes straight, it instead is bent toward your eye. Sundogs normally occur in the rising or setting sun, when the sun's at a low angle. This time of year is the best opportunity to see sundogs, because most of us are awake to see the sun rise and set. The cold helps with making ice crystals, too. So look for sundogs on your commute home. It's like three suns in the sky. They're pretty awesome."
Jeremy Darst, naturalist, Whitewater State Park