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

Coastal flooding occurs when water from the ocean, sea, or large lakes inundates land areas along the coast, usually due...

A body that has the property of absorbing all electromagnetic radiation falling on it, and therefore is the theoretical body...

Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility....

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

An elongated area of relatively low atmospheric pressure, often associated with unsettled weather conditions like storms...

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

A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...

An instrument used to measure the speed, force, and sometimes the direction of the wind. It can be cup or pressure tube anemometers....

Considerable cloudiness refers to weather conditions where a large portion of the sky is covered with clouds, but some clear...

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