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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

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

A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...

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

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

An image on the weather radar that is convex to the direction of movement and resembles an arc shape, caused by mesoscale...

The measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....

A long, narrow region in the atmosphere that transport water vapor, like a river in the sky.

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

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

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