All About Fog

Fog, we have heard of it, seen it and probably driven through fog. But do you know what fog is? Have you ever heard that fog eats snow? What is the best way to drive in fog? These are questions I hope to answer below.

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. Fog can also be caused by warm moist air blowing over a cold surface, such as snow and ice. This type of fog is called advection fog. Another type of fog is radiation fog. Is most common in the fall, when nights get longer, air-masses begin to cool, and land and water surfaces that have warmed up during day, evaporate water into the atmosphere.

Does fog eat snow?
I have heard this for as long as I can remember. But is it eaten? There is much back and forth on this. What seems to be a common thinking is that the fog is advection fog, warm air blowing over a cool surface causes the snow to melt. There is also thoughts that because of the mist/rain associated with the fog the snow is melted. Lastly there is the fact that temperatures are just warmer and the snow is melting. I going with the fog just eats the snow.

Driving in fog:
Driving on a foggy road requires patience and concentration. Main thing is slow down. You can’t see anything so what’s your hurry. Make sure to keep you low beams on and your hi beams off. If you live in fog prone areas a good, quality, set of fog lights might be a worthy investment. They do work well but must be properly installed low on the vehicle. Use your windshield wipers and defroster to keep the windshield clear. Also when driving in fog you may be tempted to follow the lights of the vehicle in front of you. Do so very cautiously as he may find himself off the road with you behind him.

The the picture used at the beginning of this article was one I took on a trip to New Hampshire last year. We had gone to town and were met by this wall of fog. The 2-3mile trek took us nearly an hour. The road was narrow with ditches on both sides. Luckily not too many people were out. Also during that day we were able to snowshoe through the woods with a healthy snow pack. The next morning almost all the snow was gone having been eaten by the fog.;) Be safe.

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