That's radiation fog, and it typically forms on clear, calm nights as the land cools via thermal radiation. When the air directly above the ground starts cooling too, it can't hold as much moisture.

Let’s break down how fog forms. According to the National Weather Service, there are five different types of fog: radiation fog, advection fog, freezing fog, evaporation fog, and hail fog.

Many people have complained about it, after a rainy week. East Tennessee can see up to two types of fog. One of them is "radiation fog." This is a more simple type of fog, where you need some ...

It's in all the best horror movies, but fog may be scariest when traveling in it. Delaware was under a dense fog advisory Tuesday morning. The fog will move off by 11 a.m. on Monday, but it's ...

Types of fog and their formation Radiation fog is when the ground is colder than the environment. It generally happens at night when the ground cools due to heat loss from the sun. The air at the ...

But why? Here's what's causing the latest bout of fog: There are a handful of different types of fog with varying characteristics, according to the weather service. "Radiation fog" forms ...

This weekend was unique in that there was the perfect setup for two different types of fog. First, there was advection fog, which forms when a cold land surface mixes with a warm, moist air mass.

There are several types of fog: radiational fog, advection fog, and even hail fog. But for the purposes of this article we are going to talk about the type of fog that hit our area: radiation fog.