A multi-day outbreak of severe thunderstorms will begin today and last through the weekend in the Midwest, South and East. Strong, long-tracked tornadoes, widespread damaging winds, large hail and flash flooding are all threats this dangerous bout of severe weather could produce.

A cross-country storm will explode in strength as it moves over the central United States Friday, delivering extreme weather to millions through the weekend, including the chance of multiple strong tornadoes.

More than 100 million people are being urged to prepare for a potentially dangerous weather outbreak that could unleash thunderstorms capable of producing hurricane-force wind gusts and

A multiday outbreak of severe weather — including the potential for strong tornadoes — will begin Friday as a strong storm system barrels across the Lower 48. Parts of the Deep South, Mississippi and Tennessee Valleys and even the East Coast will be impacted by severe thunderstorms,