Undulus Asperatus

Two days ago I woke up and as usual checked my phone and noticed lots of people posting pictures of cool looking clouds on Instagram, so I grabbed my camera and went outside. This is what I found:

 They are a very rare cloud formation recently classified as Undulus Asperatus, which sounds a lot like a cool Harry Potter spell. They are formed when warm air is sitting on top of cold air. I wish it happened more often because they are very cool!