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

Occurs when centers of high pressure and/or low pressure set up over a region in such a way that they prevent other weather...

Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.

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

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

Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.

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

The state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.

A large, organized thunderstorm with a rotating updraft, often producing severe weather such as tornadoes, hail, and heavy...

A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...

A middle cloud type within the B family in the international cloud classification. These are shaded clouds that can be white...