The National Weather Service on Friday warned that potentially strong tornadoes may develop on Saturday over the lower to middle Mississippi and Tennessee valleys. Lightning, wind gusts of at least 74 mph and hail of at least two inches will accompany the outbreak over parts of the valleys and Southeast through Sunday.

A powerful strom system is forecast to sweep the south Friday and into the weekend, spreading the threat for severe weather all across portions of the US.

Meteorologist Devon Lucie compares the differences in timing between forecasts for storms on Saturday then shows who's at the greatest risk for severe storms and strong tornadoes walking you through your parish-by-parish forecast showing the exact timing of storms where you are,

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 storms that caused deadly crashes and fanned more than 100 wildfires in several central states.