Do you have modern windows, sealed tight, with multiple panes? Then you probably don’t see this when it gets very cold. But if you have a sun porch with old, leaky window, and storm windows that rattle around in their aluminum frames, then you get to see Jack Frost in action.
That first photo has traditional ice crystals, stellated like snowflakes, spreading across the glass. These always remind me of William Morris fabrics. The ice on the storm door on the front of this house has a very different pattern that forms, though I am at a loss to tell you why. It is less recognizable as ice, but more interesting for playing games of imagination.
I took this in a hurry today. I’ll go back for more tomorrow.