This was taken February 2nd on the way to work. This is just south of the little town of Princeton, Iowa, looking SE. Looking over Mississippi River, which has not frozen over (reason for vapors rising). Conditions were about 2F (-17C), winds at about 20 mph (+30 kph). The parhelion, colloqually called a Sun Dog, is caused by light reflecting and refracting off ice crystals in the upper atmosphere. The steady winds align the crystals so they act in concert. Usually only visible in high latitudes and/or cold winters.
