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.

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.

The impacts are already beginning in some areas while preparations are being rushed to completion in other regions, so here's the very latest on everything: Severe thunderstorm winds are no joke—they account for 70% of all severe weather reports and can be just as destructive as a tornado.