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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

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

A blizzard is a storm that lasts 3 hours or more, with persistent winds/frequent gusts of 35 mph or more along with significant...

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

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

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

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

The heating of the Earth by the sun causes daily changes in both the direction and speed of the wind. During the day, ground...

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

Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...

The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.