Dozens of tornadoes are reported from thunderstorms that lit up the radar from Wisconsin to Mississippi in the early hours Saturday.

A strong storm system moves though our area and the southeast US bringing a major tornado outbreak. For us 11-noon through 6-7pm is out tome to stay weather aware. Damaging winds and hail are all possible. Stay with FOX 8 for the latest. pic.twitter.com/0ifVAVITzP

The National Weather Service warned of extreme weather across a vast swath of the country that is home to more than 100 million people.

The dangerous outbreak will sweep through the Midwest, South and East through the weekend. Saturday could be one of the worst severe weather days of the year.

A powerful low-pressure system is likely to spawn a dangerous outbreak of severe thunderstorms in portions of the Midwest, South and East, where tornadoes, widespread damaging winds, large hail and flash flooding are all concerns.

The threat of tornadoes is moving east into the Mississippi Valley and Deep South a day after a massive storm system moving across the country unleashed winds that damaged buildings, whipped up dust s