Millions brace for tornado outbreak as highest severe weather risk level issued on Saturday

Millions brace for tornado outbreak as highest severe weather risk level issued on Saturday

A widespread and dangerous severe weather outbreak is expected to develop Friday and into the weekend as a powerful storm system unleashes its fury across the central and eastern U.S., impacting more than 150 million people. The Storm Prediction Center upgraded Saturday's risk to its highest level as a tornado outbreak is now expected.