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

Condensation is the process by which water vapor in the air cools and changes into liquid water. This process is crucial...

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

Confluence refers to the area where two or more air streams or bodies of water meet and combine. In meteorology, it often...

An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...

A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...

A thick cloud of tiny water droplets suspended in the atmosphere near the Earth's surface, significantly reducing visibility.

The mass of air surrounding the earth and bound to it more or less permanently by the earth's gravitational attraction.

Ball lightning appears during thunderstorms, taking the shape of glowing, electric orbs in the sky. It can appear in a variety...

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