Dark blue cloudy sky

What is Advection Fog?

The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over a warm and moist surface. Examples include advection fogs, monsoon fogs, sea fog, and tropical air fog.

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Glossary

A drainage wind that flows downhill due to gravity, often associated with cold air descending from elevated regions.

A middle cloud type within the B family in the international cloud classification. These are shaded clouds that can be white...

A weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...

Large, fluffy white clouds with flat bases, typically indicating fair weather, though they can develop into storm clouds...

Considerable cloudiness refers to weather conditions where a large portion of the sky is covered with clouds, but some clear...

Frozen drizzle is a dangerous type of frozen rain. It’s a light rain that falls in very fine drops, which freezes on contact...

Condensation pressure deficit refers to the difference between the actual vapor pressure and the saturation vapor pressure...

Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility....

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

Temperature scale, abbreviated as °C, found by accepting the freezing point of water at one atmospheric pressure as zero...