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 polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...

An instrument for measuring atmospheric pressure.

In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...

Large, fluffy white clouds with flat bases, typically indicating fair weather, though they can develop into storm clouds...

A cold core high is a high-pressure system with cold air at its center. These systems are typically associated with clear...

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

The percentage of water vapor in the air relative to the maximum amount of water vapor the air can hold at a given temperature.

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

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

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