Explore weather patterns and severe storms in this 46-minute lecture. Delve into various air masses, including polar, continental, and maritime types, and their effects on North American weather. Examine frontal systems, thunderstorms, and the formation of midlatitude cyclones and anticyclones. Investigate the characteristics and causes of tornadoes, learning about the tornado scale and warning systems. Analyze hurricanes and typhoons, understanding their structure, formation, and destructive potential, with a focus on notable events like Hurricane Harvey. Gain insights into storm surges and the use of Doppler radar in severe weather monitoring.