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

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

The scientific study of climate, focusing on the analysis of long-term weather patterns and trends over time.

The occurrence of storms resulting from the horizontal advection of cold air at high levels or the horizontal advection of...

The term used for turbulence occurring in the absence of clouds or cloud-like elements in the visible area. It is often observed...

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

The situation where there is no advection because the constant pressure surfaces and temperature surfaces in the atmosphere...

A weather watch means there is a risk of weather hazards in the near future, which could pose a threat to life/property....

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

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

Bright and dark rays with changing colors and contrast in the sky. These rays become visible due to the reflection of atmospheric...