Written for the undergraduate, introductory course, the updated Fourth Edition engages students with real-world examples and a captivating narrative. It highlights how we observe the atmosphere and then uses those discoveries to explain atmospheric phenomena. The text begins with discussions on primary atmospheric variables involved in the formation of weather: pressure, temperature, moisture, clouds, and precipitation, and include practical information on weather maps and weather observation. It then progresses to discuss weather and climate topics such as the interaction between atmosphere amd ocean, severe/extreme weather, weather forecasting, and climate change. The updated Fourth Edition includes new content on recent meteorological topics, including geomagnetic storms, normal temperatures, extreme rainfall, flooding, global-scale winds, tornado outbreaks and debris, the air pollution in China, the hole in the ozone layer, ocean acidification, and many more engaging topics. New sections on Superstorm Sandy and Cyclone Forecasting, the tornados of 2011, and conceptual models of frontal systems have been added making the Fourth Edition of Meteorology: Understanding the Atmosphere the most up-to-date and invaluable resource available.