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

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

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

A mass of very cold, dry air that mostly originates over the Arctic Ocean.

A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...

A periodic warming of sea surface temperatures in the central and eastern Pacific Ocean, significantly influencing global...

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

A cloud of irregular appearance, composed of irregular cloud fragments.

Perhaps you have come across them, maybe you are seeing them for the first time. These clouds, known as wave clouds, resemble...

The reflectance rate of a surface, indicating the amount of electromagnetic radiation reflected from the surface. It depends...

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