What a beautiful view a couple of nights ago as I glanced out the window at 10pm. Best guess I can come up with is a lenticular cloud. I’ve seen lots of these clouds in photos by Galen Rowell, most commonly associated with mountain areas. There are mountains not too far from here I suppose, but whatever caused it I’m glad it did. Perhaps it’s time to call in the cloud busters, aka The Cloud Appreciation Society..