National Geographic : 2012 Jul
wrote author Willa Cather, scribe of the Great Plains, "and some in storm." She wasn't referring to the local weather, but she might as well have been. Each year the Ameri- can heartland o ers a graduate course in natural tumult. From March to October these atlands play host to thousands of visible, violent storms. Meteorology and topography conspire to paint blusterous murals and apocalyptic tableaux. When dry air from the Rockies slides over "SOME THINGS YOU LEARN BEST IN CALM,"