Dark blue cloudy sky

What is Aeroallergens?

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

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Glossary

Frozen drizzle is a dangerous type of frozen rain. It’s a light rain that falls in very fine drops, which freezes on contact...

Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...

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

The mass of air surrounding the earth and bound to it more or less permanently by the earth's gravitational attraction.

Nor'easter is a meteorological event commonly observed in the Northeastern United States and typically occurs during the...

A middle cloud type within the B family in the international cloud classification. These are shaded clouds that can be white...

A weather system refers to the movement of warm and cold air across the globe, usually in a recurring pattern. Systems can...

Considerable cloudiness refers to weather conditions where a large portion of the sky is covered with clouds, but some clear...

Precipitation in the form of small balls or lumps of ice that form in thunderstorm updrafts and fall to the ground.

The horizontal transport of any feature within the atmosphere due to the movement of air (wind). This includes phenomena...