Fog Facts for Kids

1. Fog is caused by tiny droplets of water and/or ice crystals that are suspended in the air near the ground.
2. Fog is able to form when the dew point and air temperature difference is less than 4 °F (2.5 °C).
3. Fog that forms at a higher altitude will form a stratus cloud.
4. Relative humidity will be at or near 100% at the ground level when fog forms.
5. Fog is common near large bodies of water and valleys.
6. Fog can produce precipitation, such as rain (drizzle) or light snow.
7. There are ten types of fog. They are advection fog, evaporation fog, freezing fog, frontal fog, ground fog, hail fog, ice fog, precipitation fog, radiation fog, and upslope fog.
8. Fog can create dangerous driving conditions by reducing visibility.
9. The National Weather Service issues a dense fog advisory when widespread fog is developing or already has developed.
10. The National Weather Service issues a freezing fog advisory when widespread fog is developing or already has developed, along with ground temperatures at or below 32 °F (0 °C).
11. Newfoundland, Canada is widely considered the one of the foggiest place on Earth. On average, they have 200+ foggy days in a year.
12. A fog machine, used commonly on Halloween or at parties, is used to create artificial fog.
13. George Washington on August 27th, 1776 used heavy fog to safely retreat from the British during the Battle of Long Island. This prevented heavy casualties during a crucial point of the American War for Independence.

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