Forecasters say a dangerous mix of warm air and fast, shifting winds is expected to spawn severe thunderstorms and violent tornadoes from the Texas panhandle into Oklahoma Monday evening and into Tuesday. “The intensity of those ingredients is of a sort that we have rarely seen before,” said Bill Bunting, chief of forecast operations at National Oceanic and Atmospheric Administration’s Storm Prediction Center. “The atmosphere is not only unstable, it is extremely unstable.”...

Source: Wall Street Journal May 20, 2019 22:19 UTC