Dark blue cloudy sky

What is Mesocyclone?

In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with a funnel cloud or tornado cloud beneath it and detectable on Doppler radar.

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Glossary

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

A mass of very cold, dry air that mostly originates over the Arctic Ocean.

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

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

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

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

The term used for semi-stationary high-pressure centers such as the Azores and North Pacific Highs, which occur in the narrow...

A line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.

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

A thermodynamic change process in the system without any exchange of heat or transfer of energy between systems. This process...