Fog Advisory For Puget Sound: 5 Things To Know

SEATTLE, WA - A dense fog advisory for Puget Sound Tuesday morning means drive slowly, and pay extra attention to what pedestrians are doing. We've had morning fog intermittently for about two weeks, but there are a few things you might not know about this spooky weather phenomenon.

Here's what to know about the fog covering Puget Sound:

1) It's going away. According to the National Weather Service, Tuesday should be the last day with fog for a while. A high pressure system is moving off, bringing rain and cooler temperatures for the rest of the week.

2) Mind the air quality. Along with fog, other harmful air particulates are getting trapped close to ground level, and that can be harmful for sensistive groups. Limit wood burning until the air clears later on Tuesday.

3) Wait, what is fog? It's basically a cloud. Fog happens when the difference between the dew point and air temperature is less than 4-1/2 degrees. Dew point is the temperature at which air becomes saturated with water vapor.

4) What should I do with my headlights? You should use headlights in fog, but not highbeams. You might think using brighter lights will help you see farther, but that's not the case. From Traveler's Insurance:

Avoid using high-beam headlights in fog as fog consists of tiny water droplets that spread and reflect light. While your high beams are not useful in the fog, remember to turn on your low-beam headlights to help other drivers see you.

5) There are no monsters/demons in the fog. Although mysterious, fog is nothing but water vapor. Or maybe that's what the government wants you to think?

File photo by Neal McNamara