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8ES Chp 20: Storms

8th Grade Earth Science Chapter 20: Storms Coach Leach

TermDefinition
air mass A huge body of air in the troposphere with similar temperature and humidity throughout.
continental air mass A low humidity air mass that originates over land.
maritime air mass A high humidity air mass that originates over the oceans.
arctic air mass A frigid air mass that originates over the poles.
polar air mass A cool or cold air mass that originates over upper latitudes.
tropical air mass A warm air mass that originates in the tropics.
front The boundary where at least tow different air masses meet.
orographic lifting The upward movement of air masses as they flow over mountains.
frontal wedging The lifting of a warm air mass above a cool air mass acting as a wedge.
convergence The lifting of air when horizontal air currents from opposite directions collide and rise into the atmosphere.
storm A severe weather disturbance involving high winds, heavy precipitation, and other conditions such as lightning or low temperatures.
winter storm A storm that brings heavy snow or sleet, high winds, and or unusually cold weather.
thunderstorm A rainstorm that produces lightning; may include hail, bursts of strong winds and even tornadoes
lightning An atmospheric electrical discharge that occurs either between clouds or between a cloud and the ground.
tornado A destructive, localized, rapidly rotating cyclonic windstorm forming a funnel; usually associated with a special cumulonimbus cloud called a supercell.
hurricane An immense cyclonic windstorm that forms over tropical or subtropical oceans; hazardous to ships at sea ad extremely damaging if it moves over land; also called a typhoon or cyclone.
tropical storm A strong cyclonic storm with winds of at least 63 km/h or 39 mph that could develop into a hurricane if it gains strength.
hurricane eye The low-pressure center of a hurricane containing relatively clear, calm rising air; usually has light winds, low precipitation, and low pressure.
storm surge A higher than normal local sea level caused by seawater flowing toward the lower air pressure under a hurricane.
station model A symbolic representation of data from a weather station on a weather map; with each number and symbol and their locations in the model, providing specific weather information.
synoptic weather map A weather map that presents a summary or synopsis of weather data for a given time frame; the four types are the Surface Weather map, the Highest and Lowest Temperatures map, the Precipitation Areas and Amounts map and the 500 Millibar Height Contours map
Created by: CoachLeach
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