A winter storm expected to become a problem later this week will have some large-scale impacts. Meteorologist Tony Pann explains how travelers should be thinking of backup plans. Subscribe to WBAL on YouTube now for more: http://bit.ly/1oJSRCN Get more Baltimore news: http://www.wbaltv.com Like us: http://facebook.com/wbaltv11 Follow us: https://twitter.com/wbaltv11 Instagram: https://www.instagram.com/wbaltv11/