US midwest and south faces potentially deadly floods and severe tornadoes

Forecasters say potent storm system moving east could become supercharged and bring life-threatening' flooding

Potentially deadly flash flooding, high-magnitude tornadoes and baseball-sized hail could hit parts of the midwest and south on Wednesday as severe thunderstorms blowing eastward become supercharged, forecasters warned.

There were tornado warnings Wednesday morning near the Missouri cities of Joplin and Columbia - merely the opening acts of what forecasters expect will be a more intense period of violent weather later on Wednesday, as daytime heating combines with an unstable atmosphere, strong wind shear and abundant moisture streaming into the nation's midsection from the Gulf.