Iowa Fog

Recently, fog has been impacting Iowa, reducing visibility to zero in some parts of the state. But what is fog?

Fog is a collection of liquid water droplets or ice crystals suspended in the air at or near the Earth's surface. While fog is a type of stratus cloud, the term "fog" is typically distinguished from the more generic term "cloud" in that fog is low-lying, and the moisture in the fog is often generated locally (such as from a nearby body of water, like a lake or the ocean, or from nearby moist ground or marshes).

So it is because of the moisture from the recent snowfalls that the fog is so prominent.