Interesting frost on my window

We had a cold snap here that created some nice patterns in the frost on my bedroom window. First was evening light, second is this morning (window faces East). I really needed a tall tripod to get the first shot nice and square the way I wanted it, but I like how the image came out with a little tweaking on the contrast.

Neat! Looks like ornate glass etching. It's normally plain clear glass?

Wow that is awesome, mother nature does some mysterious things

The frost is on a modern storm window outside of a 1930's double hung upper section. The feathery patterns and symmetry only happen on these windows, none of the other ones in the house get much frost at all.

Here's one from midday: