Frigid afternoon cloud over Grand Marais

I just got home from Grand Marais where I saw one of the more intriguing clouds I've ever seen over the lighthouse.  It held this general shape for at least half an hour, which was interesting considering it was fairly windy.  It looked like a pretty high altitude cloud and I'm guessing the wind was worse along the ground.  The temperature was about 5 degrees below zero so it was pretty frigid outside with the wind!