Then after I thought about this further, I struggled to think of another image that might convey the nature of fog. A blank gray blotch would capture the gloominess and lack of visibility, but a website visitor might mistake this for a coding error.
Perhaps fog simply lacks the more spectacular meteorological extravaganza of, say, a thunderstorm or a blizzard, and the best image we can create to represent fog is one that captures the effects of the weather, rather than the weather itself.
Anyways, the fog was short-lived in Northwest Ohio, and by dawn it had mostly evaporated around my house.