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

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

A very cold high pressure that originates over the Arctic Ocean.

The temperature at which air becomes saturated with moisture and water vapor begins to condense into liquid form, leading...

A deviation from the normal or expected value in atmospheric or climatic conditions, often used in meteorology to identify...

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

The amount of radiation, heat, or light passing through or flowing from a unit area of a surface.

A distinct layer in a body of water where the temperature changes rapidly with depth, separating warmer surface water from...

A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...

A drainage wind that flows downhill due to gravity, often associated with cold air descending from elevated regions.

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