A sundog flanked the Aerial Lift Bridge this morning. Do you see the rainbow of light on the right? There was another rainbow arch on the left, but I didn’t have a wide enough camera lens to capture it. Sundogs are very hard to get a photo of because the arcs are so far apart from each other. The only time I’ve ever seen a sundog was when it was at least 30 degrees below zero, but I don’t think it was quite that cold today. At 6 a.m. it was 21 below zero.
According to the of NOAA National Weather Service Central Region Headquarters, a ring of light is sometimes visible around the sun or moon. When this happens, itâ€™s because light is refracted through ice crystals in the atmosphere. Another solar phenomenon is the sundog or mock sun. It also produced by refraction of light through ice crystals. When the sun is near the horizon, a sundog would appear as brightly colored spots on either side of the sun. This means there are more clouds with ice crystals and therefore wetter weather may be on the way! For a more in-depth explanation, go to this great online textbook on weather forecasting.