21 Fog Facts For Kids

1. Fog is a type of cloud that develops on or near the Earth’s surface and not in the atmosphere.
2. Fog is essential tiny liquid or frozen water droplets that form together to make a visible aerosol on or near the ground.
3. Fog starts to form when there is a less than 4.5 ˚F difference between the air temperature and the dew point.
4. To be define as fog, the cloud needs to reduce visibility at least 0.62 miles or it’s only considered mist.
5. There are several different types of fog, based on how the condensation was created and cooled.
6. Precipitation fog is formed when rain falls from the clouds, meets drier air, starts to evaporate into water vapor and then reaches the dew point.
7. Evaporation fog is formed over bodies of water, evaporated water meets air that is much cooler in the water, causing it to condensate right above the water surface.
8. Radiation fog is formed by the Earth’s surface cooling off after the sun has set. The air temperature is rapidly cooled by conduction, causing it to reach the dew point.
9. Freezing fog is formed when the temperature is cold enough to create ice crystals near the surfacer and they attach themselves to particles in the air.
10. Super fog is formed by smoke from a wildfire and water vapor attaching themselves to particles in the smoke.
11. Artificial fog (man-made) is formed using a fog machine and a liquid containing glycol or glycerin.
12. A few other types of fog are advection fog, frontal fog, ground fog, hail fog and ice fog.
13. All types of fog can create hazardous travel conditions, especially when traveling by vehicle.
14. The National Weather Service (NWS) predicts, monitors, and issues advisories for foggy conditions.
15. The NWS issues two different fog advisories based on local conditions: defense fog advisory and freezing fog advisory.
16. The NWS will issue a dense fog advisory when fog forms in your area and reduces visibility below 0.25 miles.
17. The NWS will issue a freezing fog advisory when fog forms in your area, temperatures are near or at freezing and visibility is reduced below 0.25 miles.
18. Fog dissipates when the air temperature and dew point have a different of more than 4.5 ˚F.
19. Arguably the foggiest place on Earth is the Grand Banks of Newfoundland. Some estimates claim they have more than 200 foggy days every year.
20. Fog drip is phenomena caused by fog water droplets adhering to branches and leaves, causing the below ground to moisture by dripping water. Some estimates claim up to 40% of the moisture used by the California Redwood forests is from fog drip.
21. Fog has helped shape the course of world history. During WW2, some of the beach landings were experience foggy conditions that gave some cover to landing Allied troops. During the American Revolutionary War, George Washington used fog to conceal their escape from the British Army.

Fog Pictures

If a picture is worth a thousand words, then the below images will be helpful for your research on fog. Below are six pictures of fog conditions in various places. These pictures should help you better understand the beauty and effects of fog.

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