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

A fixed potential temperature line on adiabats, or the process of thermodynamic changes within a system without any exchange...

A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...

The jet stream forming the boundary between tropical air and sub-tropical air, characterized by isothermal compression and...

An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...

Ball lightning appears during thunderstorms, taking the shape of glowing, electric orbs in the sky. It can appear in a variety...

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

The temperature at which air becomes saturated with moisture and water vapor begins to condense into liquid form, leading...

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 heating of the Earth by the sun causes daily changes in both the direction and speed of the wind. During the day, ground...

A line of severe thunderstorms that can form along or ahead of a cold front, often producing strong winds and heavy rain.