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

The large-scale movement of air that distributes heat and moisture around the Earth, influencing weather patterns and climatic...

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

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

A measurement determined by the wave lengths and sea conditions caused by the effect of wind, and by the movement of tree...

Air laden with sand and dust, common in areas devoid of permanent vegetation, especially deserts.

The expected rate of temperature decrease in an adiabatically rising air parcel when there is no heat exchange with the environment....

A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...

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

The measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....