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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 occurrence of storms resulting from the horizontal advection of cold air at high levels or the horizontal advection of...

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

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 continental air mass is a large body of air that forms over land, characterized by dry conditions due to the lack of moisture...

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

The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...

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

A strong wind typically ranging from 34 to 40 knots (39 to 46 miles per hour) and often associated with rough seas and stormy...

A fixed potential temperature line on adiabats, or the process of thermodynamic changes within a system without any exchange...

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