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What is Celsius?

Temperature scale, abbreviated as °C, found by accepting the freezing point of water at one atmospheric pressure as zero and the evaporation point as 100.

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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...

An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...

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

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

Any form of water - liquid or solid - that falls from the atmosphere to the Earth's surface, including rain, snow, sleet,...

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

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

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

Ball lightning appears during thunderstorms, taking the shape of glowing, electric orbs in the sky. It can appear in a variety...