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Discover the intricate workings of midlatitude cyclones, from their formation to movement and impact on weather patterns. Explore the factors that contribute to the development and lifespan of these dynamic storm systems. Learn about the key characteristics and behavior of midlatitude cyclones in North America.
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Midlatitude Cyclones (Storms) • Extratropical cyclone or wave cyclone or frontogenesis or storm • Low pressure area with counter-clockwise circulation. • Atmosphere collects water as water vapor in evaporation from oceans, lakes. • It is returned via precipitation, often caused by storms.
Storms Center of intense low pressure with cyclonic circulation and resultant precipitation. • Midlatitude Cyclone • Hurricane • Tornadoes • Not thunderstorms, no cyclonic motion.
Cyclogenesis in Action:Mid-latitude (extratropical) cyclones
Air MassesDefinition: volume of air with same temperature and humidity characteristicsSource Regions: where air masses come from.Classification: warm or cold, moist or dry
Today’s Weather Map Weather Maps
Storm Tracks: North America Storms (Storm Tracks) generally travel from West to East in North America all year They shift North in summer & South in Winter Actual Storm Tracks (1991) Average Storm Tracks Moving West To East
Midlatitude Cyclone Characteristics Motion:these storms move across the midlatitudes at about 30 m.p.h. from west to east as they rotate once around a low pressure center. Size: roughly 1,000 miles in diameter, the largest of storms Lifespan: 3-6 days to develop, 3-6 to dissipate Pressure: center roughly 990-1000 mb (1-2 % drop)