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| large body of air that the same characteristics of temperature and moisture content as the part of the earth over which it formed |
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| boyundrey line betwen two airmasses with different temperatures, density, or moisture; can be cold, warm, occulded, and stationary |
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| violent, whirlimg wind storm that crosses land in a narrow path and can result from wind shears inside a thunder head |
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| large, severe storm that forms over tropical oceans, has winds of at least 120 km/h, and loses power when it reaches land |
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| winter storm that lasts at least three hours with temperatures of -12oC or below, poor visiblity, and winds of at least 115 km/h |
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| studies weather and uses information from Doppler radar, weather satellites, computers, and other instruments to make weather maps and provide forecasts |
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| indicates weaher conditions at a specific location, using symbols on a map |
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| line drawn on a weather map that connects points having equal temperature |
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| lines drawn on a weather map that connects points having equal atmosheric pressure, also indicate location of high and low pressure areas and can show wind speed |
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| is caused when two portions of a cloud are oppositly charged and when a current flows inbetween the two oppositly charged portions |
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| The sound of a lighting strike |
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| occur in warm, moist air masses and along fronts heavy rain can cause tornados |
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| occurs when colder air advances towards warm air |
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| occurs when warm air advances toward cold air |
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| involves three air masses at different temperatures which are; colder air, cold air, and warm air |
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| Air mass from North Pacific |
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| Air mass from South Pacific |
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| measures atmospheric pressure |
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| Occurs when neither the warm front nor cold front can advance |
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| High pressure areas accociated with fair weather |
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| Large swiling areas of low pressure accociated with stormy weather Same as a hurricane but in the Indian Ocean and spins clockwise |
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| Area that has cold temperatures |
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| Area that has warm temperatures |
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| The scale used to rank tornados occurding to the amount of damage they do (F0-F5) |
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| Conditions favorable for a severe storm |
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| dangerous conditions already exist |
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| Same as a hurricane but in the Pacific Ocean |
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