What is Arctic Air?

An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...

A type of cloud consisting mostly of small particles such as ice particles.

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 thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.

A long, narrow region in the atmosphere that transport water vapor, like a river in the sky.

A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...

In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...

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

Any form of water - liquid or solid - that falls from the atmosphere to the Earth's surface, including rain, snow, sleet,...

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