What is Air Mass?

A line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.

A strong, downward wind caused by a localized column of air sinking rapidly, often resulting in damage similar to that caused...

A low-pressure area with converging winds, rotating counterclockwise in the Northern Hemisphere and clockwise in the Southern...

A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...

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 process by which a solid changes directly into a gas without first becoming a liquid, such as ice turning into water...

A storm characterized by the presence of lightning and its acoustic effect on the Earth's atmosphere known as thunder.

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

A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...

The upward movement of air caused by a topographic barrier, such as a mountain, which can lead to cloud formation and precipitation.