Thunderstorms reach their greatest intensity during the4
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In which stage of the life cycle of a single thunderstorm cell occur both up- and downdrafts simultaneously?4
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Thunderstorms are often preceded by:4
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Which of the following phenomena are formed when a moist, stable layer of air is forced to rise against a mountain range ?4
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In unstable air, surface visibility is most likely to be restricted by4
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When will the surface wind in a METAR record a gust factor ?4
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How is the direction and speed of upper winds described in forecasts ?4
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Which constant pressure altitude chart is standard for FL 300?4
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Isotachs are lines joining equal4
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In which of the following 1850 UTC METAR reports, is the probability of fog formation, in the coming night, the highest?4
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