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

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Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.

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

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

The term 'cloudy' refers to weather conditions characterized by a significant amount of cloud cover in the sky. This may...

Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.