National Weather Service Meteorologist Robb Lawson presents this advanced class, focusing on the science behind severe weather events like thunderstorms and tornadoes. The session was designed to be more in-depth than the normal spotter training events.
Lawson explains that what makes the Central Plains region unique and a prime area for supercell thunderstorms with tornadoes is the climate's dry lines. A dry line is an imaginary boundary that separates a moist air mass from a dry air mass. He provides examples of historic Kansas tornadoes that were associated with a dry line and also the dynamics behind other infamous tornadoes such as the 2011 Joplin EF-5 tornado.
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