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What is Humidity?

The amount of water vapor present in the air, which can affect comfort levels and weather conditions.

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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...

A scale for estimating wind speed based on observed conditions of the sea or land. It ranges from 0 (calm) to 12 (hurricane)...

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

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

Snow that rises to 8 feet or higher.

A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...

Temperature scale, abbreviated as °C, found by accepting the freezing point of water at one atmospheric pressure as zero...

A rapidly rotating column of air extending from a thunderstorm to the ground, capable of causing significant damage.

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

Condensation pressure deficit refers to the difference between the actual vapor pressure and the saturation vapor pressure...