Dark blue cloudy sky

What is Fog?

A thick cloud of tiny water droplets suspended in the atmosphere near the Earth's surface, significantly reducing visibility.

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Glossary

The measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....

A very cold high pressure that originates over the Arctic Ocean.

The state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.

A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...

Coastal flooding occurs when water from the ocean, sea, or large lakes inundates land areas along the coast, usually due...

Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.

A cloud that develops from Cirrus, completely or partially covering the sky, creating a halo effect, thin, sheet-like, milky...

A large body of air having similar horizontal temperature and moisture characteristics.

The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...

A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...