What is Arctic Air?
A mass of very cold, dry air that mostly originates over the Arctic Ocean.
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A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...
A low-pressure area with converging winds, rotating counterclockwise in the Northern Hemisphere and clockwise in the Southern...
The measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....
The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...
Frozen drizzle is a dangerous type of frozen rain. It’s a light rain that falls in very fine drops, which freezes on contact...
The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...
A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...
An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...
A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...
Condensation pressure deficit refers to the difference between the actual vapor pressure and the saturation vapor pressure...