January 12, 1888, began as an unseasonably warm morning across Nebraska, the Dakotas, and Minnesota, the weather so mild that children walked to school without coats and gloves. But that afternoon, without warning, the atmosphere suddenly, violently changed. One moment the air was calm; the next the sky exploded in a raging chaos of horizontal snow and hurricane-force winds. Temperatures plunged as an unprecedented cold front ripped through the center of the continent. By Friday morning, January 13, some five hundred people lay dead on the drifted prairie, many of them children who had perished on their way home from country schools. In a few terrifying hours, the hopes of the pioneers had been blasted by the bitter realities of their harsh environment. Recent immigrants from Germany, Norway, Denmark, and the Ukraine learned that their free homestead was not a paradise but a hard, unforgiving place governed by natural forces they neither understood nor controlled.