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What is Weather?

Weather is the day-to-day meteorological conditions that happen in our atmosphere. Weather can change within minutes, which is why it can be difficult to forecast.

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Glossary

The state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.

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

A type of low-altitude cloud that forms in uniform layers, often covering the entire sky and producing overcast conditions.

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

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

The situation where there is no advection because the constant pressure surfaces and temperature surfaces in the atmosphere...

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

A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...

A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...

A middle cloud type within the B family in the international cloud classification. These clouds consist of water droplets...