Dark blue cloudy sky

What is Hail?

Precipitation in the form of small balls or lumps of ice that form in thunderstorm updrafts and fall to the ground.

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Glossary

The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.

A closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...

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

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

A cold core low is a low-pressure system where the coldest temperatures are found near the center. These systems are often...

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

An elongated area of relatively low atmospheric pressure, often associated with unsettled weather conditions like storms...

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

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

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