Weather forecasters warn about a major multiple-day outbreak of severe weather that includes multiple strong tornadoes from the Mississippi Valley to the Gulf Coast, Great Lakes and Atlantic coast through the weekend.

There is the potential for severe weather across the southeastern parts of the United States over the next several days, including Louisiana, Alabama, Tennessee and Georgia. On Sunday, that severe weather threat extends into north and central Florida.

A powerful storm system is set to bring multiple rounds of dangerous severe thunderstorms, with numerous strong tornadoes possible, from the Midwest to the Southeast beginning Friday. Threat level: A total of about 100 million people live in areas under threat from straight-line wind damage,