Formation of fog

Very often, when you get up in the morning and look out of the window, you will see white mist covering the grass, or trees shrouded in Grey fog. This is especially true on cold winter mornings. Why does this happen?

We know that when water vapor up in the air cools, it forms water droplets that come together as clouds. However, when this water vapor condenses closer to the ground, it forms what we know as mist and fog. Mist and fog usually form at night when the air is too cold to hold all its moisture. Although mist and fog look like smoke, they are actually tiny drops of water floating in the air. In fact, you can say that they are clouds that have formed at ground level.

Tags: fog, mist, climate, weather