Dark blue cloudy sky

What is Blocking Pattern?

Occurs when centers of high pressure and/or low pressure set up over a region in such a way that they prevent other weather systems from moving through.

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Glossary

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

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

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

A low-pressure area with converging winds, rotating counterclockwise in the Northern Hemisphere and clockwise in the Southern...

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

A storm characterized by the presence of lightning and its acoustic effect on the Earth's atmosphere known as thunder.

A periodic cooling of sea surface temperatures in the central and eastern Pacific Ocean, often leading to altered global...

A type of cloud consisting mostly of small particles such as ice particles.

A small, intense downdraft that produces damaging winds at the surface, typically lasting a few minutes and often associated...

A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...