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

Thermodynamic changes occurring within a system without any exchange of heat with the surroundings. In the atmosphere, changes...

The percentage of water vapor in the air relative to the maximum amount of water vapor the air can hold at a given temperature.

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

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

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

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

A weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...

Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility....

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

Convection is the vertical movement of air caused by temperature differences, where warm air rises and cool air sinks. It...