I'm not much for omens, but...

When I attended my Hampshire College reunion earlier this month, the weekend's weather started out with several inches of rain.  It cleared on Saturday morning; when I stepped out from lunch then and happened to look up in the south-facing sky, I saw these wisps of colorful prismatic clouds suspended over the Holyoke Range of mountains and rushed to find a clear view before they dissipated.  I was pleased to collect the images.  I don't recall having seen this rather uncommon atmospheric phenomenon before, and it was a nice treat for at least this attendee.