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 weather system refers to the movement of warm and cold air across the globe, usually in a recurring pattern. Systems can...

Weather is the day-to-day meteorological conditions that happen in our atmosphere. Weather can change within minutes, which...

An image on the weather radar that is convex to the direction of movement and resembles an arc shape, caused by mesoscale...

Frozen drizzle is a dangerous type of frozen rain. It’s a light rain that falls in very fine drops, which freezes on contact...

Conduction is the transfer of heat or electricity through a material without the material itself moving. This occurs when...

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

Thermodynamic changes occurring within a system without any exchange of heat with the surroundings. In the atmosphere, changes...

A low-pressure area with converging winds, rotating counterclockwise in the Northern Hemisphere and clockwise in the Southern...

Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...

The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...