Dark blue cloudy sky

What is Squall Line?

A line of severe thunderstorms that can form along or ahead of a cold front, often producing strong winds and heavy rain.

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Glossary

Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...

The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.

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

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

Snow that rises to 8 feet or higher.

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

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

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

A strong wind typically ranging from 34 to 40 knots (39 to 46 miles per hour) and often associated with rough seas and stormy...

A continental air mass is a large body of air that forms over land, characterized by dry conditions due to the lack of moisture...