Air Mass: A large body of air with the uniform temperature and humidity of its source region.
Anticyclone: A large area of high atmospheric pressure, characterized by outward-spiralling winds. A HIGH.
Atmospheric Pressure: The force exerted by the atmosphere's weight on a surface of unit area.
Climate: The long-term average weather of a region.
Cyclone: A large area of low atmospheric pressure, characterized by inward-spiralling winds. A LOW.
Front: The surface between two different air masses.
High: The centre of an area with high atmospheric pressure.
Humidity: The amount of water vapour in the air.
Isobar: A line through points of equal atmospheric pressure.
Low: The centre of an area with low atmospheric pressure.
Polar Front: The surface between polar and tropical air masses, along which cyclonic disturbances form.
Synoptic Chart: A map depicting the weather in an area at a given moment.
Wave Cyclone: A storm or low-pressure centre that moves along a front.