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Fourth Exam - ATMO 105
Thunderstorms to Forecasting
13
Geology
Undergraduate 1
04/21/2010

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Cards

Term
Cumulus Stage / Developing Stage
Definition
Masses of moisture are lifted upwards into the atmosphere. Causes formation of cumulus clouds.
Term
Mature Stage
Definition
Precipitation begins to fall. Creates downdrafts. Precipitation, lightning, and thunder are the most intense.
Term
Dissipative Stage
Definition
Precipitation diminishes and sky begins to clear.
Term
Severe Thunderstorm
Definition
93 km/h (58 mph / 50 kts) winds, hailstones of 0.75in or spawns tornadoes.
Term
Mesoscale Convective Systems
Definition
Oval or circular organized systems containing several thunderstorms. Outflow boundary forms a new thunderstorm cell.
Term
Supercell Thunderstorms
Definition
Single massive cell.
Term
Downburst
Definition
Created by an area of significantly rain-cooled air that spreads out in all directions as strong winds.
Term
Mesocyclone
Definition
Vortex of air within a storm. Have the tendency to form tornadoes and severe hail.
Term
Wall Cloud
Definition
Form where cool, humid air from zones of precipitation is drawn into the updraft feeding the main cloud. Associated with tornado devlopement.
Term
Funnel Cloud
Definition
Tornado that hasn't touched the ground.
Term
Waterspout
Definition
Generally weaker than tornadoes. Form over warm bodies of water.
Term
Trade Winds
Definition
Easterly surface winds found in the tropics near the equator.
Term
Hurricane Sustained Winds
Definition
120km/hr (74 mph)
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