The central US is no stranger to sudden changes in weather, but the temperature fluctuations and weather phenomena that struck on November 11, 1911, were about as unusual as it gets. On that day, many cities experienced record high temperatures before the mercury plummeted to record lows. Springfield, Missouri, for example, was a balmy 80°F (27°C) before the cold front passing through the region brought it down to a frigid 13°F (-11°C). What else did the front bring with it? Discuss (http://forum.thefreedictionary.com/postst47291_The-Great-Blue-Norther--1911-.aspx)