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, and the moisture in the fog is often generated locally (such as from a nearby body of water, like a lake or the ocean, or from nearby moist ground or marshes). Fog is distinguished from mist only by its density, as expressed in the resulting decrease in visibility: Fog reduces visibility to less than 1 km (5/8 statute mile), whereas mist reduces visibility to no less than 1 km . For aviation purposes in the UK, a visibility of less than 5 km but greater than 999 m is considered to be mist if the relative humidity is 70% or greater – below 70% haze is reported..
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Famous quotes containing the word fog:
“as if in a fog of feather-light
goosedown-silvery seed-thoughts
a rusty mind in its autumn
reviewed, renewed
its winged power.”
—Denise Levertov (b. 1923)
“think of innocent Icarus who is doing quite well:
larger than a sail, over the fog and the blast
of the plushy ocean, he goes. Admire his wings!”
—Anne Sexton (1928–1974)
“Drop down, O fleecy Fog and hide
Her skeptic sneer, and all her pride!”
—Francis Bret Harte (1836–1902)