anticyclone - large weather system where air spins around a center of high pressure. They spin clockwise in the Northern Hemisphere and counterclockwise in the Southern Hemisphere., atmosphere - layers of gases surrounding a planet or other celestial body., atmospheric pressure - force per unit area exerted by the mass of the atmosphere as gravity pulls it to Earth., blizzard - storm with high winds, intense cold, heavy snow, and little rain., Celsius scale - scale for measuring surface temperature, used by most of the world, in which the boiling point of water is 100 degrees., climate - all weather conditions for a given location over a period of time., cloud - visible mass of tiny water droplets or ice crystals in Earth's atmosphere., cold snap - short period of intense, cold weather., cumulonimbus - low-level cloud that produces rain, thunder, and lightning. Also called a thunderhead., current - steady, predictable flow of fluid within a larger body of that fluid., cyclone - weather system that rotates around a center of low pressure and includes thunderstorms and rain. Usually, hurricanes refer to those ones that form over the Atlantic Ocean., downpour - heavy rain, drought - period of greatly reduced precipitation., dust storm - weather pattern of wind blowing dust over large regions of land., flood - overflow of a body of water onto land., forecast - to predict, especially the weather., frost - thin coat of ice covering objects when the dew point is below freezing., heat wave - period of unusually hot weather., humidity - amount of water vapor in the air., jet stream - winds speeding through the upper atmosphere., lightning - sudden electrical discharge from clouds., microburst - powerful winds that originate in rain clouds, hit the ground, and fan out., precipitation - all forms in which water falls to Earth from the atmosphere., warm front - mass of warm air that replaces a mass of cold air.,

Weather / National Geographic.

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