Out this morning early to move one car and help scrape another, I skittered over the icy driveway and marveled at the cold fog that envelops our neighborhood. It looks like frozen fog to me, but then I wondered, is there such a thing?

There is, I learned, but we don’t have it this morning. Frozen fog appears only in very cold conditions (minus 40 degrees) or in very rare ones (with 100 percent humidity and very quick freezing). I also learned that in the western United States early settlers called this ice fog pogonip, a variation of the Shosone word for cloud.

I will keep calling it frozen fog, though. I like the alliteration — and the crow-cawing loneliness of the scene outside my window. I am also most grateful that I don’t have to go out in it this morning. Frozen fog is best viewed from inside.

Photo from an earlier, snowier winter.