More than 30 million Americans across the nation's northern tier were under winter weather advisories or warnings while tornadoes swept the South.

<p>More than 30 million Americans across the nation's northern tier were under winter weather advisories or warnings while tornadoes swept the South.</p>

Get the latest news, sports, entertainment, money and tech stories from USA TODAY through your voice assistant.

<p>Get the latest news, sports, entertainment, money and tech stories from USA TODAY through your voice assistant.</p>