Frozen Wave?

One of the buildings at my principal worksite features a greenhouse which is a popular place for our visitors to sit and have a bite to eat. With the recent snowstorms, the roof of the greenhouse has been covered with a light coating of snow and ice, which is melting to create an unusual formation. It looks a lot like a wave caught in mid-crest:

Here is the formation from a slightly different angle:

The pity is that, where you see it abruptly end, I had to use a broomstick to knock down a portion of the formation which was hanging over a doorway like a cold, translucent Sword of Damocles. I don't even want to think about how much that beautiful thing must have weighed, seeing that it could have come down with crashings and smashings on my poor, tender head.