Last week, we received plenty of rain. The ground is still wet. We call this particular fog radiation fog. It’s not because it’s radioactive.
Under clear skies at night, heat radiates from the surface of the earth to deep space in the infrared spectrum. This allows everything near ground level to cool. With the ground being wet, and very little wind, the dew point temperatures remain high. When the cooling occurs at night, some of the water in the air condenses producing fog.
Below is a weather story article from the National Weather Service.
Friday through Sunday will be wet again. It’s not clear to me whether we will get more rain than snow.