What is Lightning?

A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...

A rapidly rotating column of air extending from a thunderstorm to the ground, capable of causing significant damage.

Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...

A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...

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

The term used for semi-stationary high-pressure centers such as the Azores and North Pacific Highs, which occur in the narrow...

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

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

A type of low-altitude cloud that forms in uniform layers, often covering the entire sky and producing overcast conditions.

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